Answer:
![12x^2-26xy-4y^2](https://img.qammunity.org/2021/formulas/mathematics/high-school/iwk36zkdugstulzncxbqupwuhld7yrx31x.png)
Explanation:
You can use f.o.i.l, or the box method.
I have drawn a picture for you to show the box method if you didn't know so. To add on to the picture, you need to combine these terms, and if there any like terms you combine them to get the simplified version.
![12x^(2)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/cib04dgkel0fnhhlp4ovjc5vuxndubed2f.png)
![-24xy-2xy-4y^(2)](https://img.qammunity.org/2021/formulas/mathematics/high-school/yjvoun1qcjicx21p5d4d3cf8hh7zzuwcv1.png)
You can combine -24xy and -2xy which will give you -26xy
So your final answer will be
![12x^2-26xy-4y^2](https://img.qammunity.org/2021/formulas/mathematics/high-school/iwk36zkdugstulzncxbqupwuhld7yrx31x.png)