\(x^2-2015x+2014=0\)
\(x^2-x-2014x+2014=0\)
\(x\left(x-1\right)-2014\left(x-1\right)=0\)
\(\left(x-1\right)\left(x-2014\right)=0\)
TH1:x -1 = 0
=>x=1
TH2 : x-2014=0
=> x=2014
\(x^3-4x=0\)
\(x\left(x^2-4\right)=0\)
\(x\left(x-4\right)\left(x+4\right)=0\)
TH1: x=0
TH2:x-4=0
=> x= 4
TH3: x+4=0
=> x=(-4)
Hok tốt
thực hiện phép tính
a) 5x(3x2-4x+2)
b)(x2-3x)(3x2-x+4)
2) tìm x biết
a) x3-6x2+12x=0
b)x3+9x2+27x+27=0
giúp mình mn ơi
Tìm x
a) 4x(x+1)-x-1 = 0
b) x3-4x2+4x =0
c) x2-3x + 2 =0
tìm x biết
a,-25+49x2=0
b,16x2-25(x-2)2
c,(3x-2)2-9(x+4)(x+4)=2
d,x3-6x2+12x-8=0
e,-27+27x-9x2+x3=0
Bài 5. Tìm x, biết:
a) x (2x - 7) + 4x -14 = 0
b) x3 - 9x = 0
c) 4x2 -1 - 2(2x -1)2 = 0
d) (x3 - x2 ) - 4x2 + 8x - 4 = 0
Tìm x:
a) 36x3-4x=0
b) 3x(x-2)-2+x=0
c) (x3-x2)-4x2+8x-4=0
d) x2-6x-16=0
e) x4-6x2-7=0
tìm x biết
a) 3x(x-1)+5(x-1)=0
b) x2-3x+2=0
Tìm x:
a) 36x3-4x=0
b) 3x(x-2)-2+x=0
c) (x3-x2)-4x2+8x-4=0
d) x2-6x-16=0
e) x4-6x2-7=0
(Mình cần gấp ạ)
Tìm x
a, 3/4x*(x2-9)=0
b, x3-16x=0
c, (x-1)(x+2)-x-2=0
d, 3x3-27x=0
e, x2(x+1)+2x(x+1)=0
f, x(2x-3)-2(3-2x)=0
Tìm x
a) x2 + 3x - ( 2x+ 6) = 0
b) 5x+ 20- x2- 4x =0
c) 3x2- 3x+ 2x3-2x2= 0
d) x3+ 27= -x2+9
