Объяснение:
1) x^2 + bx - ax - ab =
x(x+b) -a(x+b) =
(x+b)(x-a)
3) z^2 + zx - zk - xk =
z(z+x) -k (z+x) =
(z-k)(z+x)
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Объяснение:
1) x^2 + bx - ax - ab =
x(x+b) -a(x+b) =
(x+b)(x-a)
3) z^2 + zx - zk - xk =
z(z+x) -k (z+x) =
(z-k)(z+x)