Stupid Algebra Question

[LedZep77]

I simplify the square root of (36+x^2) to 6+x, right? Any stupid algebra rules preventing it?

Sorry, I haven't taken Algebra since my sophomore year in high school so I'm a little rusty

 

[Gitfiddler]

i don't think so. Check your answer by plugging in a number for x.

"(36+x^2) to 6+x." pick x = 2. (36+2^2) = 40. The square root of 40 is not 8. (6+2)

(6+x)^2 does not equal 36+x^2. Remember the FOIL method for multiplying..

(6+x)(6+x)= 36+12x+x^2

I don't know that there is a way to simplify the square root of 36+x^2 other than simply expressing it as (36+x^2)^1/2 or writing 36+X^2 and then drawing the square root sign over it

 

[Anonymous]

I simplify the square root of (36+x^2) to 6+x, right? Any stupid algebra rules preventing it?

Sorry, I haven't taken Algebra since my sophomore year in high school so I'm a little rusty

Wrong. It is already in its simplest form...

Steve

 

[LedZep77]

Thanks guys

 

[david simpson]

 

[Zach]

I simplify the square root of (36+x^2) to 6+x, right? Any stupid algebra rules preventing it?

Sorry, I haven't taken Algebra since my sophomore year in high school so I'm a little rusty

Wrong. It is already in its simplest form...

Steve

can't simplify it since it's addition

36+x^2 square root is the best you can do.

 

[GRK]

x+6 would be the square root of x^2+12x+36 I think.