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(3x + 5y) (3x + 7y)
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Answered by
3
Step-by-step explanation:
3x(3x+7y)+5y(3x+7y)
9x²+21xy+12xy+35y²
9x²+33xy+35y²
Answered by
2
Answer:
9x^2 + 36xy + 35y^2
Step-by-step explanation:
(3x+5y)(3x+7y) = 9x^2 + 21xy + 15xy + 35y^2
=》9x^2 + 36xy + 35y^2 .
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