please solve this ... with full explanation....
(a+b+c)^2 + (a-b-c)^2 + (a-b+c)^2
by using method
algebric questions...
Answers
Answered by
1
Answer:
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Step-by-step explanation:
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Answered by
2
Answer:
=a²+b²+c²+2ab+2bc+2ca+(a-(b+c))²+[(a-b)+c]²
=a²+b²+c²+2ab+2bc+2ca+a²+(b+c)²-2a(b+c)+(a-b)²+c²+2c(a-b)
=a²+b²+c²+2ab+2bc+2ca+a²+b²+c²+2bc-2ab-2ac+a²+b²-2ab+c²+2ac-2bc
=3(a²+b²+c²)-2ab+2bc+2ca
3(a²+b²+c²)-2(ab-bc-ca)
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