Write as a product of two polynomials

a) 3a (2x-7) + 5b (7-2x)

b) (x-y) ^2-a (y-x)

a) (3a-5b) (2x-7) or (-3a+5b) (7-2x)

b) (x-y) (x-y+a) or (y-x) (y-x-a)

Step-by-step explanation:

a) 3a (2x-7) + 5b ( - (-7+2x))

3a (2x-7) - 5b (2x-7)

(3a-5b) (2x-7)

3a ( - (-2x+7)) + 5b (7-2x)

-3a (7-2x) + 5b (7-2x)

(-3a+5b) (7-2x)

b) (x-y) ^2-a ( - (-y+x))

(x-y) ^2+a (x-y)

(x-y) (x-y+a)

(-1 (-x+y)) ^2-a (y-x)

(1 (y-x) ^2-a (y-x)

(y-x) (y-x-a)