simplify (5x+7y)² + (5x-7y)²
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Answer:
50x2+49y2 please follow me and thank me
Answered by
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Answer:
50a² + 98y²
Step-by-step explanation:
let
5x = a
7y = b
therefore
(5x+7y)² + (5x-7y)² = (a+b)² + (a-b)²
= { a² + b² + 2ab } + { a² + b² - 2ab }
= 2a² + 2b²
putting value of a & b
we get,
= 2(5x)² + 2(7y)²
= 2(25x²) + 2(49y²)
= 50a² + 98y²
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