Question

Simplify using special products:
(2x+5y)^2+(2x-5y)^2

Answer 1

(2x+5y)²+(2x-5y)²

$(a + b) ^{2} + (a - b) ^{2} = 2(a ^{2} + b ^{2})$

2{(2x)²+(5y)²}

2(4x²+ 25y²)

8x²+ 50x²

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