# Thread: solve trinomials with two unknows

1. ## solve trinomials with two unknows

Hi all;
I know how to factor 5x^2 + 13xy + 8y^2 (5x + 8y)(x + y)
How do I go an to solve it?

Thanks.

2. Originally Posted by anthonye
Hi all;
I know how to factor 5x^2 + 13xy + 8y^2 (5x + 8y)(x + y)
How do I go an to solve it?

Thanks.
Do you have a value for the expression?
What is the purpose of factoring?

3. Originally Posted by anthonye
Hi all;
I know how to factor 5x^2 + 13xy + 8y^2 (5x + 8y)(x + y)
How do I go an to solve it?

Thanks.
What do you mean solve it? Equations are solved but since you have not posted an equation, only an expression, there is nothing to solve. Note: Equations have an "=" sign in them eg. x^2 - 5x + 6 = 0.

4. Yeah I should of edited my post lets say it equals 0 then how to solve.

5. Originally Posted by anthonye
Yeah I should of edited my post lets say it equals 0 then how to solve.
(5x + 8y)(x + y) = 0 => 5x + 8y = 0 or x + y = 0 and various re-arrangements can be made to make either x or y the subject. Unless further information is known, nothing more can be done.

6. Of course I just didn't see it thanks again.