SOLUTION: I need help with the following question. The problem needs to be solved using subsitution. The answer that I got does not agree with the answer in the book. y=x^2 x^2+y^2=1

Algebra ->  Systems-of-equations -> SOLUTION: I need help with the following question. The problem needs to be solved using subsitution. The answer that I got does not agree with the answer in the book. y=x^2 x^2+y^2=1       Log On


   

Question 134935This question is from textbook algebra 2
: I need help with the following question. The problem needs to be solved using subsitution. The answer that I got does not agree with the answer in the book.
y=x^2
x^2+y^2=1 This question is from textbook algebra 2

Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
Given : y=x%5E2
x%5E2%2By%5E2=1
y%2By%5E2=1
y%5E2%2By-1=0
Use the quadratic equation x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
x+=+%28-1+%2B-+sqrt%28+1%2B4+%29%29%2F%282%29+
x+=+%28-1+%2B-+sqrt%28+5+%29%29%2F%282%29+