Question

Theo started to solve the quadratic equation (x + 2)2 – 9 = –5. He added 9 to both sides and the resulting equation was (x + 2)2 = 4. Next, he took the square root of each side. Which was the resulting equation of that step?

Answer 1

Answer:x + 2 = ±2

Explanation:

on edge

Answer 2

`x+2=\pm2`

Explanation:

He started with
`(x+2)^2-9=-5`.

He add 9 to both sides and the resulting equation was

`(x+2)^2=4`

Next, he took the square root of each side.

The resulting equation of this step is:

`(x+2)=\pm √(4)`

`x+2=\pm2`

The required equation is:

`x+2=\pm2`