Question

-3 √81+ √16 combine these radicals.

A. -23
B. -11
C. -3 √97
D. -3 √13

Please help!!

Answer 1

-3√81+√16=-3(9)+4=-27+4=-23

Answer: A.-23

Answer 2

Answer:

$\text{The value of }-3\sqrt{81}+\sqrt{16}\text{ is -23}$

Option A is correct

Step-by-step explanation:

Given the expression

$-3\sqrt{81}+\sqrt{16}$

We have to simplify the above expression.

$-3\sqrt{81}+\sqrt{16}$

$\sqrt{81}=(9^2)^{\frac{1}{2}}=9$

$\sqrt{16}=\sqrt{4^2}=4$

$-3\sqrt{81}+\sqrt{16}$

$=-3\times 9+4$

$=-27+4$

$=-23$

Hence, option A is correct.