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Algebra Difficulty 3.8 AMC 10/12 Find the answer South Africa
The values of x satisfying the equation (x−7)(x+12)=−48 are
Pick one
Solution
Multiplying out the equation gives x2+5x−84=−48, so x2+5x−36=0. This factorizes to (x+9)(x−4)=0, so x=−9 or x=+4.
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