Answer:
For 2a, we are completing the square (see the image below)
To find the stationary point (2b) you change the sign of the number inside the brackets and keep the number outside the same i.e (-2, 7)
Hope this helps!
A.) True because I know it is
The answer is x = 5. Hope that helps, God bless!
The angles are equal (alternate angles in parallel lines)
X + 86 = 80
X = 80 - 86 = -6