\(x^2-3x+2=0\\ < =>\left(x^2-x\right)+\left(-2x+2\right)=0\\ < =>x\left(x-1\right)-2\left(x-1\right)=0\\ < =>\left(x-1\right)\left(x-2\right)=0\\ < =>\left[{}\begin{matrix}x-1=0\\x-2=0\end{matrix}\right.\\ < =>\left[{}\begin{matrix}x=1\\x=2\end{matrix}\right.\)
Vậy: ...
tìm x biết: a) (x-1)^2 - (2x)^2 = 0; b) (3x-5)^2 - x(3x-5)=0
Bài 2: Tìm x, biết: a) (x + 2)^2 – 2(x + 2)(x – 5) = 0. b) 2x^2 + 3x – 5 = 0. c) x + 2 ^2 x 2 + 2x^3 = 0. d) (3x-1)^2-4(x+5)^2=0
Tìm x biết a) 3x^2+x)4-3x)=12 b)3x^2-2x-1=0
Tìm x biết: 3x(x – 2) – x + 2 = 0
Tìm x biết:
a) 3x(x-1)+x-1=0
b)2(x+3)-x2-3x=0
tìm x biết
a/x^3+3x^2+3x+2=0
b/x^4-2x^3+2x-1=0
c/x^4-3x^3-6x^2+8x=0
Tìm x biết
2(x+3)-x\(^2\)-3x=0
Tìm x biết:
\(\dfrac{3x-x^2}{x^2-9}=0\)
Tìm x biết:
a) x\(^2\) + 5x = 0
b) 3x(x – 1) = 1 – x
c) 2x(x + 2) – 3(x + 2) = 0
