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08-07-2017
Mathematics

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Factor to find the zeros of the function defined by the quadratic expression. −7x2 − 91x − 280

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08-07-2017

There are no zeroes for an expression, only for equations.
Assuming equation to be
−7x^2 − 91x − 280=0
-7(x^2+13x+40)=0
-7(x+8)(x+5)=0
by the zero product properties,
x+8=0 => x=-8
or
x+5=0 => x=-5

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