(x-5)(2y+4)-(x-5)(4y+1) = (x-5)[(2y+4)-(4y+1)(x-5)(2y+4)-(x-5)(4y+1) = (x-5)(2y+4-4y-1(x-5)(2y+4)-(x-5)(4y+1) = (x-5)(-2y+3)
Ответ: (x-5)(-2y+3)
(x-5)(2y+4)-(x-5)(4y+1) = (x-5)[(2y+4)-(4y+1)
(x-5)(2y+4)-(x-5)(4y+1) = (x-5)(2y+4-4y-1
(x-5)(2y+4)-(x-5)(4y+1) = (x-5)(-2y+3)
Ответ: (x-5)(-2y+3)