Question

(4x - 15)m (20 - 3x)m​

Answer 1

$(4x - 15)m (20 - 3x)m$

$(4xm - 15m)(20m - 3xm)$

$80 {m}^{2} x -12(mx ) {}^{2} - 300 {m}^{2} + 45 {m}^{2} x$

$-12(mx ) {}^{2} + (80m {}^{2}x + 45 {m}^{2} x) - 300 {m}^{2}$

$- 12 {m}^{2} {x}^{2} +125{m}^{2} x - 300 {m}^{2}$