Question

If x2 = 40, what is the value of x?+80O +20O V80O V40

Answer 1

`\begin{gathered} x^2=40 \\ \end{gathered}`

To solve this, you need to make this

Step 1

square root in both sides

`\begin{gathered} x^2=40 \\ √(x^2)=√(40) \\ \text{the }√(\square)\text{ is eliminated by the exponent} \\ x=√(40) \end{gathered}`

Now, the two solutions for this are.

`\begin{gathered} x=√(40) \\ x=-√(40) \\ \\ \end{gathered}`

so, the answer is

`x=\pm√(40)`

I hope it helps you.