Question

What is `15-3[2+6(-3)]`?

Answer 1

`63`

Explanation:

`15-3[2+6(-3)]`

Firstly start with the brackets:
`6(-3)=-18`

Now the problem is this:
`15-3(2-18)`
`color(white)(xxxxxxxxxxx)(2-18)=(-16)`
`15-3(-16)`
`color(white)(xxxxxxxxxx)-3(-16)=48`

When you times two minuses, they become positive

`15+48=63`

Answer=`63`

To answer these types of questions, use BIDMAS or BODMAS.