Question

[giúp mik với]

Tìm x biết:

a/ 5x( x- 3) = x – 3              b/ x³ -  x = 0                      c/ x² – 7x + 6 = 0

d/ x² – 4 + ( x – 2)²  = 0       e/ x² – 16 –( x +4) = 0           f/ x² + x – 2 = 0

Answer 1

[Nguyễn Lê Phước Thịnh]

a: \(\Leftrightarrow\left(x-3\right)\left(5x-1\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x=3\\x=\dfrac{1}{5}\end{matrix}\right.\)

b: \(\Leftrightarrow x\left(x-1\right)\left(x+1\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x=0\\x=1\\x=-1\end{matrix}\right.\)