## simplify expression with exponent? (x-25)^2

Simplificatation, evaluation, linear equations, linear graphs, linear inequalities, basic word problems, etc.

### simplify expression with exponent? (x-25)^2

I have been learning about simplifing expressions. However I am confused what to do when there is more than one item inside the brackets with an Exponent?

I was given the puzzle (x-25)^2 = X^2 -25

I can add 25 to each side as the first step, but I am not sure what to do next.

I think I get X^2 -625 + 25 = X^2

I am not sure if it should be +625 or -625... I think I am just missing something basic, but I can not fathom it out.
Lyracian

Posts: 1
Joined: Tue May 12, 2009 6:33 pm

Lyracian wrote:I was given the puzzle (x-25)^2 =...

Squaring is squaring, regardless of what is being squared!

. . . . .$(x\, -\, 25)^2\, =\, (x\, -\, 25)(x\, -\, 25)$

Then multiply the polynomials to complete the simplification.

stapel_eliz

Posts: 1715
Joined: Mon Dec 08, 2008 4:22 pm