Question

solve for x 3x^ - 4 = 8

Answer 1

Answer:

1/8

Step-by-step explanation:

i added and combined like terms and got 1/8

Answer 2

Answer:   $x$ ≈ $\±0.782$

Step-by-step explanation:

You need to solve for "x" in order to find its value.

 First, you need to apply the Negative exponent rule. This is:

$a^{-n}=\frac{1}{a^n}$

 Then:

$3x^{- 4}= 8$

$\frac{3}{x^4}=8$

Now you can solve for "x":

 $3=8x^4$

$\frac{3}{8}=x^4$

Remember that:

$\±\sqrt[n]{a^n}=\±a$

Then, you get:

$\±\sqrt[4]{\frac{3}{8}}=x$

 $x$ ≈ $\±0.782$