7 (6) + 14!!! And this needs to be 20 characters long so I’m adding this
B - 63 Degrees, obviously because all angles add up to a sum of 180 degrees.
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}
1/23 = 0.043
I hope this helps :)