Posted by **Danielle** on Wednesday, April 4, 2007 at 7:04pm.

Can somebody please explain to me how to factor trinomials that contain two unknown variables and are complex sum & product??

Examples:

2x^2 + 13xy + 15y^2

11x^2 + 14xy + 3y^2

I understand how to factor trinomials that only have x as the variable, but please someone help with the steps!

There really is not much different ..from what you have been doing with one unknown.

11x^2 + 14xy + 3y^2

(11x + 3y)(x+y)

Does that work?

I will be happy to critique your work on the other.

Yea, that's right.

I just need to know how you arrived to that answer. My teacher wants us to show all the steps involved, etc.

Like this:

3x^2 + 7x + 2=

3x^2 + 6x + 1x + 2=

3x(x + 2) + 1(x + 2)=

(x + 2)(3x + 1)=

You fill in in. I just factored.

ok.. my teacher didn't teach us that method. instead he taught us to factor completely.. so i'm stuck because that's how he wants us to arrive at our answer.

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