yolo3745
26.03.2020 •
Mathematics
Given that the measure of ∠x is 75°, and the measure of ∠y is 90°, find the measure of ∠z
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Ответ:
Step-by-step explanation:
(x−1)²−9=0
(x-1)²= 9
x-1 = ±√9
x-1 = ±3
x = 1-3=-2 or x=1+3=4
the solution = {-2,4}