Question

Solve the value of x in x² - 4 =5

Answer 1

The value of x in the given expression is either +3 or -3. Hence, the solution is ± 3. (Option 1)

Step-by-step explanation:

We can solve the value of x by adding 4 on both sides of the equation.

`\begin{gathered} x^2-4+4=5+4 \\ x^2=9 \end{gathered}`

Then, get the square root of both sides of the equation.

`\begin{gathered} \sqrt[]{x^2}=\sqrt[]{9}^{} \\ x=\pm3 \end{gathered}`