Factor the expression. x^4+6x^2-7 completely. show work!

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.