Question

(2 . 4x³ - 6x - 1 - 2x² + 2x - 7) . 2x - 5

Answer 1

(2.4x³-6x-1-2x²+2x-7).2x-5

(8x³-6x-1-2x²+2x-7).2x-5

(8x³+(-6x+2x)+(-1-7)-2x²).2x-5

(8x³-4x-8-2x²).2x-5

=2x(8x³-4x-8-2x²)-5

Espero que te sirva.