Question

Multiply: (3- 2x+5x^2) by (5x-4)​

Answer 1

$(3 - 2x + 5 {x}^{2} )(5x - 4)$

$= (5 {x}^{2} - 2x + 3 )(5x - 4)$

$= 5x(5 {x}^{2} - 2x + 3) - 4(5 {x}^{2} - 2x + 3)$

$= 25 {x}^{3} - 10 {x}^{2} + 15x - 20 {x}^{2} + 8x - 12$

$= 25 {x}^{3} - 30 {x}^{2} + 23x - 12$