Posted by **Lily** on Saturday, May 18, 2013 at 9:19am.

Solve the system: y^2 - 4x^2 = 4 and y = 2x.

(-1,-2)?

- Algebra 2 -
**Steve**, Saturday, May 18, 2013 at 11:58am
did you plug in your values to see whether they work?

Guess not, since (-1,-2) yields

(-2)^2 - 4(-1) = 4

4 + 4 = 4

Bzzzt

Since y=2x, substitute it into the other equation:

(2x)^2 - 4x^2 = 4

4x^2 - 4x^2 = 4

0 = 4

Bzzzt. No solutions

- Algebra 2 -
**Lily**, Saturday, May 18, 2013 at 12:04pm
It feels like too many problems have no solutions! Very frustrating for me. Thank you for checking it!

- Algebra 2 -
**Steve**, Saturday, May 18, 2013 at 12:11pm
Yeah, they have tossed a lot of them your way. Expect some on the test, I guess. Always check you proposed answer, if you get one, to make sure it works!

## Answer this Question

## Related Questions

- Algebra, help needed - I need help I don't know how to solve this system Solve ...
- Algebra - I need help I don't know how to solve this system Solve the following ...
- algebra 2 - Nonlinear systems Solve the system by elimination. y=x^2+2 -4x-y=10 ...
- algebra 2 - Nonlinear homework... Solve the system by elimination. 1)y=x^2+2 -4x...
- College Algebra - Solve the system of equations using matrices. If system has no...
- College Algebra - Solve the system of equations. Then classify the system. 7x-7y...
- algebra - i need help with these problems (either a solution or how to plug them...
- math - Please explain in detail how to solve each question: At a certain high ...
- Algebra - Use Cramer's rule to solve the following system of equations. If D=0, ...
- Algebra 2 - Solve each system 3x+2y= -2 9x- y= -6 I know how to solve for x but ...

More Related Questions