Question

(2x-3)(x-3)-2(x+5)(x-7)=8

Giúp mk vs ạ. Mk cần gấp. Đừng làm tắt nha mn.

Answer 1

\(2x^2-9x+9-2\left(x^2-2x-35\right)=8\)

\(\Leftrightarrow-5x+79=8\Leftrightarrow x=\dfrac{71}{5}\)

Answer 2

`(2x-3)(x-3) - 2(x+5)(x-7)=8`

`2x^2 -9x+9 - 2x^2 -4x - 70 = 8`

`-5x + 79 = 8`

`-5x = -71`

`x=-71 : (-5)`

`x=71/5