Fill (a+b) ^2 +.......... = 2(a^2+b^2)
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Answered by
1
Step-by-step explanation:
(a+b)^2+(a-b)^2=2(a^2+b^2)
Answered by
1
Answer:
when you show that the right side of the equation is equal to the left side, by expanding it out and then factorising :
Step-by-step explanation:
(a+b)²+(a-b)²
=(a+b)(a+b)+(a-b)(a-b)
=(a²+ab+ab+b²)+(a²-ab-ab+b²)
=a²+2ab+b²+a²-2ab+b²
=2a²+2b²
=2(a²+b²)
therefore, it is shown that
2(a²+b²)=(a+b)²+(a-b)²
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