How do you simplify $3- sqrt[81]+(-2)^3$ ?

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Answer 1 · 2018-04-07T18:39:20

$-14$

Here's how I did it:

$3-sqrt81+(-2)^3$

First, we know that $(-2)^3$ is the same thing as:
$(-2)(-2)(-2) => (4)(-2) => -8$

Let's put this back into the expression:
$3-sqrt81+(-8)$

$3-sqrt81-8$

$-5-sqrt81$

We also know that $sqrt81 = 9$ , so:
$-5-9 =-14$

Hope this helps!

How do you simplify 3- sqrt[81]+(-2)^33- sqrt[81]+(-2)^3?