Question

Subtract the following
2x³ + 4x² - 7x from 5x³ - 2x² + 5x


Answer is 3x^3 - 6x^2 + 12x
I need explanation​

Answer 1

$\frac{ \binom{ \: \: \: \: \: 2 {x}^{3} + 4 {x}^{2} - 7x }{( - )5 {x}^{3} - 2 {x}^{2} + 5x } }{3 {x}^{3} - 6 {x}^{2} + 12x}$