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x2 + 11x + 18

(x + 9)(x + 2)

CHECK:

x2 + 9x + 2x + 18

x2 + 11x + 18

SET EACH EQUAL TO ZERO:

x + 9 = 0

x = -9

x + 2 = 0

x = -2

NOW YOU ARE DONE:

Solution set: {-9, -2}

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15y ago

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