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01-11-2014
Mathematics

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Select the product of (7x - 2)(7x + 7).

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Аноним Аноним

01-11-2014

(7x-2)(7x+7)

=(7x)²+49x-14x-14

=7²x²+35x-14

=49x²+35x-14

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01-11-2014

(7x - 2)(7x + 7)
= 7x * 7x + 7x * 7 - 2 * 7x - 2 * 7
= 49x² + 49x - 14x - 14
= 49x² + 35x - 14

Answer Link

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