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22-11-2016
Mathematics

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Find the product of (3x + 7y)(3x − 7y).

9x2 − 42xy + 49y2

9x2 + 42xy + 49y2

9x2 − 49y2

9x2 + 49y2 ...?

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MaliaHale MaliaHale

22-11-2016

(3x+7y)(3x-7y)
9x2-21xy+21xy-49y2
9x2-48y2

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22-11-2016

Hi. Find the product of (3x + 7y)(3x − 7y). 9x² - 21xy + 21xy - 49y². 9x² - 49y². The answer is : 9x² -49y².

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