Question

Can someone help me with this question ?

Answer 1

5

Explanation:

`√(a^3-7)` + | b |

note the absolute value function always gives a positive result, that is

| - a | = | a | = a

then substituting a = 2 and b = - 4 into the expression

`√(2^3-7)` + | - 4 |

=
`√(8-7)` + | 4 |

=
`√(1)` + 4

= 1 + 4

= 5