Answer:

8x⁴+42x³+66x²+152x-168

Step-by-step explanation:

2(4x-7)(x+2)(x-2)(x-3)

(8x-14) " " "

(8x²+2x-28)(x²-3x-2x+6)

8x⁴+40x³+48x²+2x³-10x²+12x+28x²+140x-168

=8x⁴+42x³+66x²+152x-168

im not sure about this coz i just tried. kindly correct me if im wrong