Question

simplifique: (x-12)(x+3)=-4x+8

Answer 1

(x-12)(x+3)=-4x+8
$x^{2}$+3x-12x-36 = -4x + 8
$x^{2}$ -9x - 36 = -4x + 8
$x^{2}$ -9x + 4x - 36 - 8 
$x^{2}$ - 5x - 44