OpenStudy (anonymous):

In my textbook it states that, "Like radicals have the same radicand and the same index." Radicand = $$\sqrt{x + 9}$$ (x + 9 being the radicand.) What does it mean by, "index" though?

OpenStudy (luigi0210):

I think it means the power. Like in this: $\LARGE \sqrt[3]{27}$ The index would be 3.

OpenStudy (anonymous):

index is the root. square root has index of 2, cube root has index of 3, fourth root has index of 4 and so on

OpenStudy (luigi0210):

Picture time:

OpenStudy (anonymous):

Luigi thanks :-).