Question

A) 5x² (6x-3y) =
b) (2x -2)(x + 5) =
c) (x- 5)(x² -4x + 20) =

Answer 1

A) 5x^2 (6x-3y) =30 x^2 - 15xy
b) (2x-2) (x+5) =2x^2 + 10x- 2x -10
                       = 2x^2 + 8x-10
c) (x-5) ( x^2 - 4x+20) =x^3- 4x^2 +20x - 5x^2+ 20 x - 100
                                    = x^3 -9x^2+40x-100