(7x+3y) square what's the answer
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Answer:
(7x+3y)²=(7x)²+2×21xy+(3y)²
=49x²+42xy+9y²
Answered by
0
Answer:
49x² + 42xy + 9y²
Step-by-step explanation:
(7x+3y)²
= 49x² + 42xy + 9y² - ((a+b)² = a² + 2ab + b²)
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