(2x + 3y)² + 2(2x + 3y) (x + y) + (x + y)²
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Answer:
9x²+16y²
Step-by-step explanation:
With help of a²+b²+2ab=(a+b)²
we consider a=(2x+3y)
b=(x+y)
therefore,
= (2x+3y+x+y)²
=(3x+4y)²
=9x²+16y²
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