Question

Разложите на множители.

a) a(b - 4) + b(4 - b) = (b - 4)(...................)

б) x(y - 3) + y(3 - y) = (3 - 4)(....................)

в) y(x - y) + c(y - x) =

Answer 1

a) = ab - 4a + 4b - b^2
б) = xy - 3x + 3y - y^2
в) = xy - y^2 + cy - cx