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

Step-by-step explanation:

(x + 5)(x - 5)

By the identity of (a + b)(a - b)

3: 2

step-by-step explanation:

shorter piece is 2: 3, so just reverse it, and you get 3: 2

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square