verification of (a+b+c)²
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Answer:
(a+b+c)2=a2+b2+c2+2(ab+bc+ac)
Step-by-step explanation:
(a+b+c)2=(a+b+c)(a+b+c)
=a(a+b+c)+b(a+b+c)+c(a+b+c)
=a2+ab+ac+ab+b2+bc+ac+bc+c2
=a2+b2+c2+(ab+ab)+(bc+bc)+(ac+ac)
=a2+b2+c2+2ab+2bc+2ac
=a2+b2+c2+2(ab+bc+ac)
(a+b+c)2=a2+b2+c2+2(ab+bc+ac)
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Answer:
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Step-by-step explanation:
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