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02-11-2016
Mathematics

contestada

A triangle has angles with the following measures: (x2 + 34)°, (6x + 4)°, and (10x + 10)°. Solve for x.

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LittleRedMe LittleRedMe

02-11-2016

The angles in a triangle add up to 180 so:

X^2 + 34 + 6x + 4 + 10x + 10 = 180

Tidy up to get a trinomial:

X^2 + 16x - 132 = 0

Solve for x.

(X + 22) (X - 6) = 0
X = -22 or X = 6

Since an angle cannot be negative, it must be X = 6.

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