Question

simplify (5x+2y)^2+(5x-2y)^2
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Answer 1

Answer:

50x²+4y² or 2(25x²+2y²)

Step-by-step explanation:

(5x+2y)²+(5x-2y)²

[Using identity (a+b) ²=a²+b²+2ab , (a-b) ²=a²+b²-2ab]

(5x)²+(2y)²+2(5x)(2y) + (5x)²+(2y)²-2(5x)(2y)

25x²+4y²+20xy + 25x²+4y²-20xy

50x²+4y² or 2(25x²+2y²)

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