Factorise: a2+b2+c2+2(ab+bc+ca)
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Answer:
(a+b+c)²
Step-by-step explanation:
a2+b2+c2+2(ab+bc+ca)
a2+b2+c2+2ab+2bc+2ca
it a formula which is
(a+b+c)²= a2+b2+c2+2ab+2bc+2ca
hence,
(a+b+c)²
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