I need to pass this test
since this is a test, I dont think anyone can help you, as that is cheating. think back to the formulas you've learned in class, and try to figure it out yourself.
YOU are not passing a test if someone else is answering the questions !
I'll give you a tiny hint:
(10x+10)2 = [2(6x-8)]2
Now, you're even more confused