Step-by-step explanation: To handle these evaluation problems, you must be able to deal with positives and negatives, and you must know your order of operations. In addition, it's a good idea to get into the habit of using parenthses when substituting numbers in for variables.
Notice that we have a set of parenthses in our problem and remember that we use parenthses when substituting our numbers into the problem.
To avoid the confusion of having too many sets of parenthses,
let's change the parenthses in the original problem to brackets.
Now let's substitute using parenthses.
So we have (5)² · [(9) - (3)].
Since the parenthses were in the original problem were replaced
by brackets and parenthses come first in your order of operations,
in our problem the brackets are going to come first.
So first simplify 9 - 3 which is 6.
So we have (5)² [(6)].
Exponents come next so we square the 5 to get 25
and that gives us (25) [(6)] which is 150.
