Factorise:
(a+b)(x+y)+c(x+y)+z(a+b+c)
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Step-by-step explanation:
ax-ay+bx-by+cx-cy+za+zb+zc
a(x-y)+b(x-y)+c(x-y)+z(a+b+c)
a+b+c(x-y)+z(a+b+c)
a+b+c+z(x-y) (a+b+c)
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