SOLUTION: Problem: y=2x y=x^2 Question: How would you solve using substitution?

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Question 542421: Problem: y=2x
y=x^2
Question: How would you solve using substitution?
Answer by fcabanski(1391) About Me  (Show Source):
You can put this solution on YOUR website!
Substitute one value of y into the other equation. Then solve for x in that equation.


Substitute y=x^2 into y=2x. It becomes...


x%5E2+=+2x


x%5E2+-+2x+=+0


x(x-2) = 0


x=0


x-2=0
x=2


Find the values of y that come from those x values.


y=2(0)=0


y=2(2)=4

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