Question

How do you simplify `2 + 3 times 5^2 - 7`?

Answer 1

Use the order of operations:
1. exponentiation
2. multiplication
3. addition and subtraction (left to right)

Explanation:

`2+3xxcolor(blue)(5^2)-7`

`=2+color(blue)(3xx25)-7`

`=color(blue)(2+75)-7`

`=color(blue)(77-7)`

`=70`