Question

Which of the following are solutions to the equation below?

x^2 + 6x + 9 = 20

Answer 1

Take me through the process or just answer. Rewarded either way.

Answer 2

I'm thinking it's A & E

Answer 3

I was correct.

Answer 4

I now give myself a pat on the back

Answer 5

Left hand side is \((x+3)^2\), so you have \[(x+3)^2 = 20\]\[(x+3) = \pm\sqrt{20} = \pm2\sqrt{5}\]
\[x = -3\pm2\sqrt{5}\]
Like you said, A and E