Question 757721: x^2 = 15x + 16
Answer by lenny460(1073)   (Show Source):
You can put this solution on YOUR website! x^2 = 15x + 16
First we have to put the above equation in standard form:
Subtract 15x from each side of the equation.
x^2 - 15x = 15x + 16 - 15x
Combine like terms:
15x - 15x = 0
Therefore:
x^2 - 15x = 16
Subtract 16 from each side of the equation.
x^2 - 15x - 16 = 16 - 16
16 - 16 = 0
Therefore:
x^2 - 15x - 16 = 0
We can factor:
x^2 - 15x - 16 to
(x + 1)(x - 16) = 0
Answer:
x = -1, 16
Lennox Obuong
Algebra Tutor
Nairobi, Kenya
Email: lennoxobuong@yahoo.com
|
|
|
