Answer:
So the intermediate step in question is (x - 10)² = 66
Step-by-step explanation:
Let's find out:
x² + 34 = 10x
x² - 10x = -34
x² - 20x + 100 = 66
(x - 10)² = 66
x - 10 = ± √66
x = 10 ± √66
x ≈ 18.12, 1.88
B.
Use (X, Y)
X being the horizontal line
Y being the vertical line
AD=16
AB=20
BD=12
9/DB=DB/AD=9/12=12/AD
9AD=144
AB^2=25^2-15^2
AB^2=400
