\(a,25x^2-1=15\)\(< =>x^2=\dfrac{16}{25}< =>x=\pm\dfrac{4}{5}\)
\(b,\left(x-4\right)^2-\left(5x+2\right)^2=0\)\(< =>\left(-4x-6\right)\left(6x-2\right)=0\)
\(< =>\left[{}\begin{matrix}x=-\dfrac{3}{2}\\x=\dfrac{1}{3}\end{matrix}\right.\)
\(c,\left(x-1\right)\left(x-9\right)=0< =>\left[{}\begin{matrix}x=1\\x=9\end{matrix}\right.\)
Tìm X:
a) 16x2-24x+9=25
b) x2+10x+9=0
c) x2-4x-12=0
d) x2-5x-6=0
e) 4x2-3x-1=0
f) x4+4x2-5=0
Tìm x biết:
a) (x+5).(2x+1)=0
b) x.(x+2)-3.(x+2)=0
c) 2x.(x-5)-x.(3+2x)=26
d) x2-10x-8x+16=0
e) x2-10x=25
f) 5x.(x-1)=x-1
g) 2.(x+5)-x2-5x=0
h) x2+5x-6=0
i) (2x-3)2-4.(x+1).(x-1)=49
j) x3+x2+x+1=0
k) x3-x2=4x2-8x+4
Mn ơi giúp em vs ạ,em cảm ơn trc ạ
Tìm X:
a)(x-4)(x+4)=9
b)x2-4x+4-(5x-2)2=0
c)4x2+4+1-x2-10x-25=0
d)(x2+x+7)(x2+x-7)=(x2+x)2-7x
Tìm x:
1) ( 4x3 + 3x3) : x3+ ( 15x2 + 6x) : ( -3x) = 0
2) ( 25x2 - 10x) : 5x + 3 ( x - 2 ) = 4
3) ( 3x + 1 )2 - ( 2x + 1/2 ) 2 = 00
4) x2 + 8x + 16 = 0
5) 25 - 10x + x2 = 0
Bài 3: Tìm x
a) (2x+3)2−4x2=10
b) (x+1)2−(2+x)(x−2)=0
c) (5x−1)(1+5x)=25x2−7x+15
d) (4−x)2−16=0
e) 3x2−12x=0
g) x2−8x−3x+24=0
Tìm x:
a) 5x(x-2)+(2-x)=0
b) x(2x-5)-10x+25=0
c) \(\dfrac{25}{16}\)-4x2+4x-1=0
d)x4+2x2-8=0
Tìm x:
a) x2+9x=0
b) (x+4)2-16=0
c) x3-16x=0
d) x2-10x+25=0
Tìm x:
a) 27x3-27x2+9x-1=\(\dfrac{-1}{8}\)
b) x(4-x)+(2x-1)(x-4)=0
c) 3x(5x-2)-10x+4=0
Tìm x:
a) x(2-x)+(x2+x)=7
b) (2x+1)2-x(4-5x)=17
c) (4-x)2-(2x+1)2=0
d) (2x3-8x2+10x) : (2x)=0
e) (4x4-16x-48) : (-2x)2=0
