Question

4x2 = 81A.x = +81/4B.x = +9/2C.X = 9/4Solve for x

Answer 1

Answer: x = 9/2, Option B

We are given the equation

4x^2 = 81

Firstly, we will need to divide both sides by 4

4x^2 / 4 = 81/4

x^2 = 81/4

Take the squareroots of both sides

`\begin{gathered} \sqrt[]{x^2}\text{ = }\sqrt[]{(81)/(4)} \\ x=\text{ }\pm\text{ }(9)/(2) \end{gathered}`