Question

use the square root property to solve the equation. the equation has real number solutions.
$3z^2 - 63 = 0$
$z=\square$
(simplify your answer, including any radicals. use integers or fractions for any numbers in the expression. use a comma to separate answers as needed)

Explanation:

Step1: Isolate the squared term

$3z^2 = 63$

Step2: Solve for $z^2$

$z^2 = \frac{63}{3} = 21$

Step3: Apply square root property

$z = \pm\sqrt{21}$

Answer:

$z = \sqrt{21}, -\sqrt{21}$