How do you use PEMDAS to simplify (7+2)^2?

2 Answers
Jan 17, 2016

81

Explanation:

The order of operations is given by BIDMAS which stands for:
Brackets
Indices
Division
Multiplication
Addition
Subtraction

Deal with the brackets first:
(7+2)^2=9^2

Then the index:
9^2=81

Jan 17, 2016

(7+2)^2=81

Explanation:

PEMDAS helps us to remember the order of operations when performing multiple operations in the same problem.

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(7+2)^2

According to PEMDAS, we need to first carry out the operation inside the parentheses, which is the addition of 7 and 2.

(7+2)^2=(9)^2

Next we apply the exponent 2 and square the 9.

9^2=81