Question

Help me with thisPlease explain in a non-complicated way with as little steps as possible. Thank you.

Answer 1

Simplify the expression inside the [ ] symbols using the law of signs:

$\lbrack-2-(+3)\rbrack=\lbrack-2-3\rbrack=\lbrack-5\rbrack$

Therefore:

$25-\lbrack-2-(+3)\rbrack^2=25-\lbrack-5\rbrack^2$

Notice that (-5)^2=+25. Then:

$25-\lbrack-5\rbrack^2=25-(+25)$

Then, there are two expression which are equivalent to the given expression:

Option a)

$25-(+25)$

Option d)

$25-\lbrack-5\rbrack^2$