# Thread: I need to see how this equation is solved with work!!

1. ## I need to see how this equation is solved with work!!

The question is Find the Value of 3a^2 - 4ab - 2b^2 when a= -1 and b= 4. I have tried so many different ways but I can’t seem to get the answer which is -13. Help!!

2. ## Re: I need to see how this equation is solved with work!!

Originally Posted by Eddyrodriguez
The question is Find the Value of 3a^2 - 4ab - 2b^2 when a= -1 and b= 4. I have tried so many different ways but I can’t seem to get the answer which is -13. Help!!
$\large 3(-1)^2-4(-1)(4)-2(-4)^2=3+16-32=~?$