Question

(3x-7)² - 5(2x+1) (x-2)= -x²-[-(3x+1)]

Answer 1

$9 x^{2} -42x+49+(-10x-5)(x-2)=- x^{2} +3x+1$
$9 x^{2} -42x+49+(-10 x^{2} +15x+10)+ x^{2} -3x-1$
$-30x=-58 \\ x= \frac{29}{15}$

Answer 2

Respuesta:

khe io No SaBer Veri mUcho