SOLUTION: Use substitution to find all solutions to the system of equations y=x^2 y=x+12

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Question 383987: Use substitution to find all solutions to the system of equations
y=x^2
y=x+12
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.y=x%5E2
2.y=x%2B12
Substitute eq. 1 into eq. 2,
x%5E2=x%2B12
x%5E2-x-12=0
%28x-4%29%28x%2B3%29=0
Two solutions:
x-4=0
x=4
Then
y=4%5E2
y=16
.
.
.
x%2B3=0
x=-3
Then,
y=%28-3%29%5E2
y=9
.
.
.