5.Factorise the following:
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Step-by-step explanation:
i)(x+y)²-z²
(x+y+z)(x+y-z)
ii)(x-y)²-z²
(x-y+z)(x-y-z)
iv)a²-(b²-2bc+c²)
a²-(b²-c²)
a²-(b-c)²
(a+b-c)(a-b-c)
iii)a²-(b²+c²+2bc)
a²-(b+c)²
(a+b+c)(a-b+c)
v)(x-1)(x+1)-a(2+a)
-a(x-1)(x+1)(2+a)
vi)by using this formula:(x²-xy+y²)(x²+xy+y²)
I don't know other answers sorry
Answer:
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