Simulatenous Equation :0 (1 Viewer)

[coyazayo]

Hi everyone reading this thread. I need help with these questions.

Q1. Solve;

3x^2-2xy-y^2=0...1

x^2+y^2=10...2

Q2. Solve;

x^2-xy+y^2=9...1

2x^2-xy=0...2

 

[Drsoccerball]

Hi everyone reading this thread. I need help with these questions.

Q1. Solve;

3x^2-2xy-y^2=0...1

x^2+y^2=10...2

Q2. Solve;

x^2-xy+y^2=9...1

2x^2-xy=0...2

Do the same thinking for q2 Hint: May involve cubes.

 

[coyazayo]

Do the same thinking for q2 Hint: May involve cubes.

Hi wouldn't (x-y+2x+2y)=3x+y instead of 3x+3y?

 

[Drsoccerball]

Hi wouldn't (x-y+2x+2y)=3x+y instead of 3x+3y?

typo its

 

[coyazayo]

I'm confused -_-.... Is it just my calculation or if you factorised out x-y it would just leave x-y+2x+2y

 

[Drsoccerball]

I'm confused -_-.... Is it just my calculation or if you factorised out x-y it would just leave x-y+2x+2y

Yes you're right sorry im out of it so you just solve like I did.

 

[axwe7]

For Question 1;

The answers for x are : x=y and x= -y/3

The answers for y are : Plus-minus sqrt 5 and y = plus-minus 3.

Can anyone correct me if I'm wrong?

 

[coyazayo]

For Question 1;

The answers for x are : x=y and x= -y/3

The answers for y are : Plus-minus sqrt 5 and y = plus-minus 3.

Can anyone correct me if I'm wrong?

Yes!!! I got that.