SOLUTION: To solve the system of equations Zach isolated x^2 into the first equation and then substituted it into the second equation.What was the resulting equation {X^2+y^2=25 {X^2/1

Algebra ->  Systems-of-equations -> SOLUTION: To solve the system of equations Zach isolated x^2 into the first equation and then substituted it into the second equation.What was the resulting equation {X^2+y^2=25 {X^2/1      Log On


   

Question 1078454: To solve the system of equations Zach isolated x^2 into the first equation and then substituted it into the second equation.What was the resulting equation
{X^2+y^2=25
{X^2/16-y^2/9=1
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
From 1,
x%5E2=25-y%5E2
So then substituting into 2,
%28%2825-y%5E2%29%29%2F16-y%5E2%2F9=1
9%2825-y%5E2%29-16y%5E2=144
225-9y%5E2-16y%5E2=144
81-25y%5E2=0