Simplest form

Find the simplest form of the following expression: 3 to the 2nd power - 1/4 to the 2nd power.

Correct answer:

x =  8.9375

Step-by-step explanation:

$x=3^2-({\displaystyle \frac{1}{4}}{)}^2={\displaystyle \frac{143}{16}}=8.9375$

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