Question

Помогите пожалуйста срочно нужно

Answer 1

1)

$15m {}^{8} n {}^{2} - 24m {}^{4} n {}^{9} = 3m {}^{4} n {}^{2} (5m {}^{4} - 8n {}^{7} )$

2)

$(x - 4)(7y + 3) - (x - 4)(5y - 9 ) = (x - 4)(7y + 3 - 5y + 9) = ( x - 4)(2y + 12)$ =

2(x-4)(y+6)

3)

$4x - 4y + cx - cy = (x - y)(4 + c)$