Find out the answer to "How do you evaluate the expression for 2x..."

Edkowiez2x

Answered question

2022-02-01

How do you evaluate the expression for $2^{x}$ if $x = - 2$ and if $x = 3$ ?

Rihanna Lester

Beginner2022-02-02Added 12 answers

Step 1
For each of these you substitute the value for x in the expression.
Solve for

x = - 2

2^{- 2}

We can use this rule for exponents to rewrite this problem:

x^{a} = \frac{1}{x^{- a}}

2^{- 2}

\frac{1}{2^{- - 2}}

\frac{1}{2^{2}}

\frac{1}{4}

Step 2
Solve for

x = 3

2^{3}

2 \times 2 \times 2

= 8

Do you have a similar question?

Recalculate according to your conditions!

Didn't find what you were looking for?