Question

6x^2+2x-9=4x^2-6x-9 (8 класс)

Answer 1

$6x^{2}+2x-9=4x^{2}-6x-9\\\\6x^{2}+2x-9-4x^{2}+6x+9=0\\\\2x^{2}+8x=0\\\\x^{2}+4x=0\\\\x(x+4)=0\\\\x_{1} =0\\\\x+4=0\\\\x_{2}=-4$

Ответ : - 4 ; 0