разложите многочлен на множители а) ax-ay+bx-by б) 2x+7y+14+xy в) ay-12bx+3ax-4by

а) ax-ay+bx-by = (ax-ay) + (bx-by) = a (x-y) + b (x-y) = (a+b) (x-y)

б) 2x+7y+14+xy = (2x+14) + (7y+xy) = 2 (x+7) + y (7+x) = (2+y) (x+7)

в) ay-12bx+3ax-4by = (3ax-12bx) + (ay-4by) = 3x (a-4b) + y (a-4b) = (3x+y) (a-4b)