SOLUTION: y=x^2-3 y=2x+1

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Question 36129This question is from textbook
: y=x^2-3
y=2x+1 This question is from textbook

Answer by ilana(307) About Me  (Show Source):
You can put this solution on YOUR website!
We can use substitution of y to say x^2-3=2x+1. So we have a quadratic equation to solve. We can write this as x^2-2x-4=0, and use the quadratic formula to get x+=+%282+%2B-+sqrt%28+4%2B16+%29%29%2F%282%29+, so x+=+%282+%2B-+sqrt%28+20+%29%29%2F%282%29+, so x=1+sqrt5, 1-sqrt5