Answer
$$p = \pm12$$
Work Step by Step
First you subtract 144 from both sides
$$-p^2 = -144$$
Then you divide by -1 on both sides
$$p^2 = 144$$
Then you find the square root of both sides
$$p= \pm12$$
That is your final answer since the variable is alone now. Remember you always have to put the plus or minus sign ($\pm$) because any number under the square root that is above $0$ has $2$ has answers.
