Wednesday

September 3, 2014

September 3, 2014

Posted by **Saud** on Wednesday, November 21, 2012 at 11:17am.

2x2 + 3xy + y2 = 0

3x + y = 2

last 2 in 2x2 is square root two, same after y2.

help please!!!!!!!!!!!!!!!

- Maths (Linear and Quadratic Equations) -
**Steve**, Wednesday, November 21, 2012 at 11:24amjust substitute the linear into the quadratic:

y = 2-3x

2x^2 + 3x(2-3x) + (2-3x)^2 = 0

2x^2 + 6x - 9x^2 + 4 - 12x + 9x^2 = 0

2x^2 - 6x + 4 = 0

2(x-1)(x-2) = 0

solutions: (1,-1)(2,-4)

or,

2x^2 + 3xy + y^2 = 0

(2x+y)(x+y) = 0

y = -2x or y = -x

3x+(-2x) = 2

x = 2, so y = -4

3x+(-x) = 2

x = 1, so y = -1

**Answer this Question**

**Related Questions**

college geomrtry - What are the differences between linear and quadratic ...

Math - What are the differences between linear and quadratic equations? How are ...

Algebra - How can you tell if an equation is quadratic and not linear? Quadratic...

Maths - Its the old rabbit colony question using simultaneous linear and ...

ALGEBRA - Can anyone give an example of a scenario that can be modeled with a ...

Algebra 2 - Can you show your work please :/ 12. Use the quadratic formula to ...

Math - Solve the following quadratic-linear system of equations. y=-x^2-x-6 y=2x...

Alg 1 quadratic equations - I'm doing quadratic equations x^2 +bx+c =0. I know ...

Math - Use the quadratic formula to solve each of the following quadratic ...

Math - What is the difference between a linear and a quadratic model? How do I ...