# How do you simplify 2 + 3 * 5^2 - 7?

May 3, 2018

Answer is $7.25$

#### Explanation:

We use PEMDAS:
Exponential first, then addition and the subtraction in this given question.
$2 + {3.5}^{2} - 7$
$2 + \textcolor{red}{12.25} - 7$ ----> exponential
$\textcolor{red}{14.25} - 7$ -----> addition
$\textcolor{red}{7.25}$------> subtraction
Answer is $7.25$

May 3, 2018

$70$

#### Explanation:

The given expression has $3$ terms.

Simplify each term to a single answer and then add or subtract them in the last step.

$\text{ } 2 + 3 \times \textcolor{red}{{5}^{2}} - 7$

$= 2 + \textcolor{b l u e}{3 \times 25} - 7$

$= 2 + 75 - 7$

$= 70$