Question

(-2x+1)(-2x-7)=0
решите уравнение

Answer 1

$(-2x+1)(-2x-7) = 0 -7-2x = 0 ; 1-2x = 0 2x+7 = 0 ; 2x - 1 = 0$
$x1 = -3,5 ;$
$x2 = 0,5$