Question

Simplify by using a suitable identity: (2x-5y)² + (2x+5y)²​

Answer 1

⏩hey mate❤

find here

(2x-5y)²+(2x+5y)²=❓

Solution:-

we know

(a+b)²=a²+b²+2ab

(a-b)²=a²+b²-2ab

so,

(2x-5y)²+(2x+5y)²

=(4x²+25y²-20xy)+(4x²+25y²+20xy)

=(8x²+50y²

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