1) x + 4y + x - 16y2) b + 64a

1) x + 4y + x - 16y =

= (x + 4y) + (x - 16y ) =

= (x + 4y) + (x - 4у)(х + 4y) =

= (x + 4y)(1 +x - 4у) =

= (x + 4y)(x - 4у + 1)

2) b + 64a + b + 8ba +16a =

= (b + 64a) + (b + 8ba +16a ) =

= (b + 4a)(а - ab + b) + (b +4a) =

= (b + 4a)(а - ab + b + b +4a)

3) Если 4-ый член не 3, а 36, то решение ниже.

x - 6x + 9x - 36 =

= (x - 6x + 9x) - 36 =

= (x - 3x) - 6 =

= (x - 3x - 6)(x - 3x + 6)

Если же четвертый член все-таки 3, то решение ниже.

x - 6x + 9x - 3 =

= (x - 6x + 9x) - 3 =

= (x - 3x) - 3 =

= (x - 3x - 3)(x - 3x + 3)

4) 7x 32z(x-y) 7y =

= (7x 7y) - 32z(x - y) =

= 7(x y) - 32z(x - y) =

= (x y)(7 - 32z)