Question

Solve x2 − 90 = 0. If necessary, round to the nearest hundredth.
8100
±9.49
There is no solution as you cannot take the square root of a negative number.
±180

Answer 1

Answer:

Option B, $x =$ ± $9.49$

Step-by-step explanation:

Step 1:  Add 90 to both sides

$x^2 - 90 = 0$

$x^2 - 90 + 90 = 0 + 90$

$x^2 = 90$

Step 2:  Square root both sides

$\sqrt{x^2} = \sqrt{90}$

$x =$ ± $9.49$

Answer: Option B, $x =$ ± $9.49$