which of the ...

Question

which of the following polynomials has the factors (x+3) (x-4) ?

$x^{2} - x - 12$

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$x^{2} + x - 12$

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$x^{2} - x + 12$

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$x^{2} - x - 2$

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Solution

The correct option is B
$x^{2} - x - 12$

Multiply the given factors as below:

$(x + 3) (x - 4) = x^{2} - 4 x + 3 x - 12 = x^{2} - x - 12$

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