(a+b)^2+(a-b)^2 simplify it
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ANSWER = 2(a²+b²)
a+b)² = a² + 2ab + b²
(a-b)² = a² - 2ab + b²
( a+b)²+(a-b)² = a² -2ab+b²+a²+2ab+b²
= a²+a²+b²+b²-2ab+2ab
= 2a²+2b²
= 2(a²+b²)
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