Question

descompuneti in factori: -5x la puterea 2 -x+4

Answer 1

-5x^2-5x+4x+4=-5x(x+1)+4(x+1)=(x+1)(-5x+4)

Answer 2

$-5x^2-x+4=-4x^2+4-x^2-x=-4(x^2-1)-x(x+1)$
=$-4(x+1)(x-1)-x(x+1)=(x+1)(-4(x-1)-x)=$
=$(x+1)(-5x+4)$