What are the roots of the quadratic equation? x2+16x−36=0

Select each correct answer.

x = 18
x = 2
x=−18
x=−2

you can select more than one answer, please have an explination with your answer but if not that's okay.

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answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°