Question

Solve `2+7+4(2-5)`?

Answer 1

`-3`

Explanation:

First you have to solve inside the parenthesis:
`2-5= -3`

Then you multiply it times `4`:
`4(-3)= -12`

and substitute

`2+7+(-12)= 2+7-12 = -3`

*Remember the hierarchy: parentheses, power and sqrt, multiplication and division, sum and subtraction

Answer 2

`-3`

Explanation:

Identify the number of terms first and then simplify each term to a single number. These are added or subtracted in the last step.

Within each term, do brackets first, then multiplication and division.

`" "color(green)(2) " "color(blue)(+ " "7)" "color(red)(+" "4(2-5))" "larr` there are `3` terms
`color(white)(wwwwwwwwwwwww.w)color(red)(darr)`
`=color(green)(2) " "color(blue)(+ " "7)" "color(red)(+" "4xx(-3))`
`color(white)(wwwwwwwwwww..w)color(red)(darr)`
`=color(green)(2) " "color(blue)(+ " "7)" "color(red)(-" "12)`

`=9" "color(red)(-" "12)`

`=-3`