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21x2 + 27x - 30 = 3*(7x2 + 9x - 10) = 3*(7x2 - 5x + 14x - 10)

=3*[x*(7x - 5) + 2*(7x - 5)]

= 3*(7x - 5)*(x + 2)

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14y ago

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3(7x - 5)(x + 2)

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9y ago
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Q: How do you factor 21x2 plus 27x-30?
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