Question

(sqrt(x)+5)^2=?

Answer 1

\[
(a+b)^2=a^2+2ab+b^2
\]

Answer 2

Multiply it out, just as you would (x+a)^2
(x+a)(x+a) = x^2 + ax + ax + a^2 = x^2 + 2ax + a^2
Then simplify.

Answer 3

but its sqrtroot... i know the formula..

Answer 4

So what?

Answer 5

So substitute sqrt(x) wherever you see a, and 5 wherever you see b. What do you get?

Answer 6

I dont know how to caluclate sqrt*sqrt

Answer 7

\[\sqrt{x}*\sqrt{x} = x\]by definition

Answer 8

Oh, cool thank you very much! :)