Question

Quadratic Equations:
Solve 2x^2 = 72

a) {±18}
b) {±36}
c) {±6}
d){±8}

Answer 1

so, your goal is to solve for your variable x, that means you want to get x by itself on one side of the equal sign, so to do that, the first thing you do is divide both sides by 2, that will get\[x^2=36\]from this, you need to take the square root of both sides, remembering that when you take the square root, your answer can take both positive and negative values, so your final answer is\[x= \pm 6\]

Answer 2

ok thank you!