OMG! This question is annoying me to death...(adsbygoogle = window.adsbygoogle || []).push({});

x^2 + y^2 = 25

x^2 + y = -5

I understand you substitute, and I did...

x^2 = -5 - y

So I plugged it in...

(-5 - y) + y^2 = 25

subtract 25) y^2 - y - 30 = 0

I tried the quadratic formula AND did the whole (y + 1)(y - 30)=0,

but they would not equal the answers: (3,4)(-3,4)(-5,0)

Please help! I can't understand why I can't get this answer, but yet I can get the others. :surprised:

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Systems of Quadratics

**Physics Forums | Science Articles, Homework Help, Discussion**