Question

-2x ori(-4x^2+5x-1)=

Answer 1

$- 2x \times ( - 4x {}^{2} + 5x - 1) = \\ - 2x \times ( - 4x {}^{2} ) +( - 2x) \times 5x - ( - 2x) \times 1 = \\ 8x {}^{3} + ( - 10x {}^{2} ) - ( - 2x) = \\ 8x {}^{3} - 10x {}^{2} + 2x$