a) \(M=\sqrt{4\left(x-1\right)}-\sqrt{9\left(x-1\right)}-\sqrt{16\left(x-1\right)}\)
\(=2\sqrt{x-1}-3\sqrt{x-1}-4\sqrt{x-1}=-5\sqrt{x-1}\)
b) \(N=\sqrt{25\left(y+4\right)}+\sqrt{36\left(y+4\right)}-2\sqrt{81\left(y+4\right)}\)
\(=5\sqrt{y+4}+6\sqrt{y+4}-18\sqrt{y+4}=-7\sqrt{y+4}\)
c) \(P=\sqrt{y-2}-3\sqrt{64\left(y-2\right)}+4\sqrt{49\left(y-2\right)}\)
\(=\sqrt{y-2}-24\sqrt{y-2}+28\sqrt{y-2}=5\sqrt{y-2}\)
a) \(M=\sqrt{4\left(x-1\right)}-\sqrt{9\left(x-1\right)}-\sqrt{16\left(x-1\right)}.\)
\(M=\sqrt{4\left(x-1\right)}-\sqrt{9\left(x-1\right)}-\sqrt{16\left(x-1\right)}\)
\(=2\sqrt{x-1}-3\sqrt{x-1}-4\sqrt{x-1}\)
\(=-5\sqrt{x-1}\)
b) \(N=\sqrt{25\left(y+4\right)}+\sqrt{36\left(y+4\right)}-2\sqrt{81\left(y+4\right)}\)
\(N=\sqrt{25\left(y+4\right)}+\sqrt{36\left(y+4\right)}-2\sqrt{81\left(y+4\right)}\)
\(=5\sqrt{y+4}+6\sqrt{y+4}\)
\(=-7\sqrt{y+4}\)
c) \(P=\sqrt{\left(y-2\right)}-3\sqrt{64\left(y-2\right)}+4\sqrt{49\left(y-2\right)}\)
\(P=\sqrt{\left(y-2\right)}-3\sqrt{64\left(y-2\right)}+4\sqrt{49\left(y-2\right)}\)
\(=\sqrt{y-2}-24\sqrt{y-2}+28\sqrt{y-2}\)
\(=5\sqrt{y-2}\)
M=-5√(x-1)
N=-7√(y+4)
P=-2√(y-2)
a. \(-5\sqrt{x-1}\)
b. \(-7\sqrt{x+4}\)
c. \(5\sqrt{y-2}\)
a) M=-5căn x-1
b) N=-7căn y+4
c) P=5căn y-2
a) -5 can x-1
b) -7can y+4
c) 5 can y-2
a, \(M=\sqrt{4\left(x-1\right)}-\sqrt{9\left(x-1\right)}-\sqrt{16\left(x-1\right)}\)
\(M=2\sqrt{x-1}-3\sqrt{x-1}-4\sqrt{x-1}\)
\(M=-5\sqrt{x-1}\) (với x ≥ 1)
b, \(N=\sqrt{25\left(y+4\right)}+36\sqrt{\left(y+4\right)}-2\sqrt{81\left(y+4\right)}\)
\(N=5\sqrt{y+4}-6\sqrt{y+4}-18\sqrt{y+4}\)
\(N=-19\sqrt{y+4}\) (với y ≥ -4)
c,\(P=\sqrt{\left(y-2\right)}-3\sqrt{64\left(y-2\right)}+4\sqrt{49\left(y-2\right)}\)
\(P=\sqrt{y-2}-24\sqrt{y-2}+28\sqrt{y-2}\)
\(P=3\sqrt{y-2}\) (với y ≥ 2)
a) M= V4(x-1) - V9(x-1) - V1)(x-1)
= 2Vx-1 - 3Vx - 1 - 4Vx-1
= -5Vx-1
b) N = V25(y+4) + V36(y+4) -2V8x1(y+4)
= 5Vx+4 + 6Vy+4 - 18Vy+4 - 18Vy+4 = 7Vy+4
c) P= V(y-2) -3V64(y-2) + 4V49(y-2)
= Vy-2 - 24Vy-2 + 28Vy-2
= 5Vy-2
a, \(M=\sqrt{4\left(x-1\right)-\sqrt{9\left(x-1\right)}-\sqrt{16\left(x-1\right)}}\)
\(=2\sqrt{x-1}-3\sqrt{x-1}-4\sqrt{x-1}\)
\(=-5\sqrt{x-1}\)
b, \(N=\sqrt{25\left(y+4\right)}+\sqrt{36\left(y+4\right)}-2\sqrt{81\left(y+4\right)}\)
\(=5\sqrt{y+4}+6\sqrt{y+4}-18\sqrt{y+4}=-7\sqrt{y+4}\)
c,\(P=\sqrt{\left(y-2\right)}-3\sqrt{64\left(y-2\right)}+4\sqrt{49\left(y-2\right)}\)
\(=\sqrt{y-2}-24\sqrt{y-2}+28\sqrt{y-2}=5\sqrt{y-2}\)
M-V4(x-1) - V9(x-1) - V16 (x-1) = -5 Vx-1
N-V25(y + 4) + V36(y+4) - 2V81(y+4)
P-V(y-2) - 3V64(y-2) +4V49(y-2) = 5 Vy-2
a) \(M=\sqrt{4\left(x-1\right)}-\sqrt{9\left(x-1\right)}-\sqrt{16\left(x-1\right)}=2\sqrt{x-1}-3\sqrt{x-1}-4\sqrt{x-1}=-5\sqrt{x-1}\)
b) \(N=\sqrt{25\left(y-4\right)}+\sqrt{36\left(y+4\right)}-2\sqrt{81\left(y+4\right)}=5\sqrt{y+4}+6\sqrt{y+4}-18\sqrt{y+4}=-7\sqrt{y+4}\)
c) \(P=\sqrt{\left(y-2\right)}-3\sqrt{64\left(y-2\right)}+4\sqrt{49\left(y-2\right)}=\sqrt{y-2}-24\sqrt{y-2}+28\sqrt{y-2}=5\sqrt{y-2}\)
a,\(M=\sqrt{4\left(x-1\right)}-\sqrt{9\left(x-1\right)}-\sqrt{16\left(x-1\right)} \)
\(M=2\sqrt{x-1}-3\sqrt{x-1}-4\sqrt{x-1}\)
\(M=-5\sqrt{x-1}\)
b,\(N=\sqrt{25\left(y+4\right)}+\sqrt{36\left(y+4\right)}-2\sqrt{81\left(y+4\right)}\)
\(N=5\sqrt{y+4}-6\sqrt{y+4}-18\sqrt{y+4}\)
\(N=-19\sqrt{y+4}\)
c,\(P=\sqrt{\left(y-2\right)}-3\sqrt{63\left(y-2\right)}+4\sqrt{49\left(y-2\right)}\)
\(P=\sqrt{y-2}-24\sqrt{y-2}+28\sqrt{y-2}\)
\(P=3\sqrt{y-2}\)
a) M= \(\sqrt{4\left(x-1\right)}\) - \(\sqrt{9\left(x-1\right)}\) - \(\sqrt{16\left(x-1\right)}\)
M=\(2\sqrt{x-1}\) - \(3\sqrt{x-1}\) - \(4\sqrt{x-1}\)
M= -5\(\sqrt{x-1}\)
b)N= \(\sqrt{25\left(y=4\right)}\) + \(\sqrt{36\left(y+4\right)}\) - \(2\sqrt{81\left(y+4\right)}\)
N= \(5\sqrt{y+4}\) + \(6\sqrt{y+4}\) - \(18\sqrt{\left(y+4\right)}\)
N= -7(y+4)
c)P= \(\sqrt{\left(y-2\right)}\) - \(3\sqrt{64\left(y-2\right)}\) + \(4\sqrt{49\left(y-2\right)}\)
P= \(\sqrt{y-2}\) - \(24\sqrt{y-2}\) + \(28\sqrt{y-2}\)
P= \(5\sqrt{y-2}\)
a, M = \(\sqrt{4\left(x-1\right)}\) - \(\sqrt{9\left(x-1\right)}\) -\(\sqrt{16\left(x-1\right)}\)
= 2\(\sqrt{x-1}\) - 3\(\sqrt{x-1}\) - 4 \(\sqrt{x-1}\)
= -5\(\sqrt{x-1}\)
b, N = \(\sqrt{25\left(y+4\right)}\) + \(\sqrt{36\left(y+4\right)}\) - 2\(\sqrt{81\left(y+4\right)}\)
= 5\(\sqrt{y+4}\) + 6\(\sqrt{y+4}\) - 18\(\sqrt{y+4}\)
= -7\(\sqrt{y+4}\)
c, P = \(\sqrt{\left(y-2\right)}\) - 3\(\sqrt{64\left(y-2\right)}\) + 4\(\sqrt{49\left(y-2\right)}\)
= \(\sqrt{y-2}\) - 24\(\sqrt{y-2}\) + 28\(\sqrt{y-2}\)
= 5\(\sqrt{y-2}\)
a) M = \(\sqrt{4\left(x-1\right)}-\sqrt{9\left(x-1\right)}-\sqrt{16\left(x-1\right)}\)
= \(2\sqrt{x-1}-3\sqrt{x-1}-4\sqrt{x-1}\)
= \(-5\sqrt{x-1}\)
b) N = \(\sqrt{25\left(y+4\right)}+\sqrt{36\left(y+4\right)}-2\sqrt{81\left(y+4\right)}\)
= \(5\sqrt{y+4}+6\sqrt{y+4}-18\sqrt{y+4}=-7\sqrt{y+4}\)
c) P = \(\sqrt{\left(y-2\right)}-3\sqrt{64\left(y-2\right)}+4\sqrt{49\left(y-2\right)}\)
=\(\sqrt{y-2}-24\sqrt{y-2}+28\sqrt{y-2}=5\sqrt{y-2}\)
a,M = căn 4(x-1)- căn 9(x-1)- căn 16(x-1)
=2 căn x-1 -3 căn x-1 - 4 căn x-1
=-5 căn x-1
b, N = căn 25( y +4)+căn 36( y+4)-2 căn 81(y+4)
= 5căn y+4 +6 căn y+4 -18 căn y +4 =-7 căn y+4
c,P = căn (y-2)-3 căn 64 (y-2)+4 căn 49(y-2)
= Căn y-2 -24(y-2)+28căn y-2=5căn y-2
a) M= 2\(\sqrt{\left(x-1\right)}\) - 3\(\sqrt{\left(x-1\right)}\) - 4\(\sqrt{\left(x-1\right)}\)= -5\(\sqrt{\left(x-1\right)}\)
b) N= 5\(\sqrt{\left(y+4\right)}\) + 6\(\sqrt{\left(y+4\right)}\) - 18\(\sqrt{\left(y+4\right)}\) = -7\(\sqrt{\left(y+4\right)}\)
c) P= \(\sqrt{\left(y-2\right)}\) - 24\(\sqrt{\left(y-2\right)}\) + 28\(\sqrt{\left(y-2\right)}\) = 5\(\sqrt{\left(y-2\right)}\)