Question

Expand. If necessary, combine like terms. (x+5)(x−5)

Answer 1

`x^(2) -25`

Explanation:

`(x+5)(x-5)`

`(x*x)(x*-5)(5*x)(5*-5)` multiply the insides by their opposites

`x^(2)-5x+5x-25` this can also be shown as
`x^(2)+5x-5x-25`

`x^(2) -25` the
`5x` and
`-5x` cancle each other out

Answer 2

x²−25

Explanation:

CLT:

Apply the formula (a-b)(a+b) = a^2*b^2. Substitute 'x' for 'a' and y for 'b'.

(x+5)(x−5)

=(x+5)(x+−5)

=(x)(x)+(x)(−5)+(5)(x)+(5)(−5)

=x²−5x+5x−25

=x²−25

Thats a lot of x's

Hope this helps!

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