Question

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

Answer 1

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+ color(red)12.25-7` ----> exponential
`color(red)14.25-7` -----> addition
`color(red)7.25`------> subtraction
Answer is `7.25`

Answer 2

`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.

`" "2+3xxcolor(red)(5^2) -7`

`=2+color(blue)(3 xx 25) -7`

`=2+75-7`

`=70`