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Find two numbers that add up to make 7 (the coefficient of the second term) and which multiply to make 10 (the product of the coefficients of the first and last terms - 1*10):

x2 + 7x + 10

= x2 + 5x + 2x + 10

= x(x + 5) + 2(x + 5)

= (x + 2)(x + 5)

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Q: How do you factor x2 plus 7x plus 10?
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