2x. 4 Find the measure of the exterior angle shown. 75° (13x - 1990
1 answer:
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Answer:
The fourth option.
Step-by-step explanation:
In the given equation x^2 + 4x + 9 = 0, a=1, b=4, and c=9. The quadratic formula is in the attachment below so if you plug in a, b, and c you get the fourth option.
