Answer:
x = 15 and x = -1
Step-by-step explanation:
x^2 - 14x = 15
Subtract 15 from both sides:
x^2 - 14x -15 = 0
a = 1, b = -14, c = -15
Use the quadratic formula:
[-(-14) ± √-14^2 - 4(1)(-15)]/2(1)
[14 ± √196 - (-60)]/2
(14 ± √256)/2
(14 ± 16)/2
(14 + 16)/2 = 30/2 = 15
(14 - 16)/2 = -2/2 = -1
x = 15 and x = -1
