SOLUTION: How would you solve the substitution equation: x+y=1 X^2+xy-y^2=-1 Thank you.

SOLUTION: How would you solve the substitution equation: x+y=1 X^2+xy-y^2=-1 Thank you.

Algebra.Com

Question 681944: How would you solve the substitution equation:
x+y=1
X^2+xy-y^2=-1
Thank you.
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!
...............1
........2
_________________________________
...............1...solve for
.......substitute in 2
______________________________
........2
.........solve for

...use quadratic formula

solutions:

and

now find

if :

if :

so, solution pairs are:
1. and
2. and

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