Question

How do you solve `5x^2 - 245 = 0`?

Answer 1

`x=7` or `x=-7`

Explanation:

`5x^2 - 245 = 0`
`5x^2 - 245 + 245 = 0 + 245` to isolate the variable term (x)
`5x^2 = 245`
`(5x^2)/5 = 245/5` to isolate the `x^2`
`x^2 = 49`
`x = sqrt49` to eliminate the `x^2`
`x=7` or `x=-7` the square can be plus or minus