Consider this expression. \sqrt{a^(3) -7} +|b| when a = 2 and b + -4 what is the value of the expression

Question

Consider this expression.
`\sqrt{a^(3) -7} +|b|`

when a = 2 and b + -4 what is the value of the expression

Answer 1

Would be:
square roof of 2^3- 7 + |-4|
square roof of 8-7 + 4
square roof of 1 +4
1+4= 5

I hope this is correct and that you understand the method