Question

Multiply (x − 4)(x2 + 6x − 5).

x3 + 2x2 − 29x + 20
x3 − 5x2 − 14x + 20
x3 + 6x2 − 13x + 20
x3 + 10x2 − 19x + 20

Answer 1

x3 + 2x2 − 29x + 20

Explanation:

x(x2+6x−5)−4(x2+6x−5)

x3+6x2−5x−4(x2+6x−5)

x3+6x2−5x−4x2−24x+20

x3+2x2−5x−24x+20

x3 + 2x2 − 29x + 20