How to multiply a monomial by two polynomials? (6-2x) (10-2x) x

How to multiply a monomial by two polynomials? (6-2x) (10-2x) x

（6-2x）（10-2x）x
=﹙60-12x-20x+4x²﹚x
=﹙60-32x+4x²﹚x
=4x³-32x²+60x

2x-1 is multiplied by another polynomial to get 8x ^ 3-1

Polynomial = (8x & # 179; - 1) / (2x-1)
=(2x-1)(4x²+2x+1)÷(2x-1)
=4x²+2x+1

If the following polynomials are multiplied, the result of x2 + 2x-8 is ()
A. （x+4）（x-2）B. （x-4）（x+2）C. （x-4）（x-2）D. （x+4）（x+2）

A. (x + 4) (X-2) = x2 + 2x-8, so this option is correct; B, (x-4) (x + 2) = x2-2x-8, so this option is wrong; C, (x-4) (X-2) = x2-6x + 8, so this option is wrong; D, (x + 4) (x + 2) = x2 + 6x + 8, so this option is wrong; a