Question

How do you solve using the square root method `2x^2-5=93`?

Answer 1

There is no `x` term, so we can just find the square root.
Remember that a number has a positive root and a negative root.

Explanation:

`2x^2 - 5 = 93`

`color(white)(xxx)` `2x^2` = `93 +5`

`color(white)(xxx)` `2x^2 = 98` `color(white)(xxxxxxxxx)` divide by 2.

`color(white)(xxx)` `x^2 = 49`

`x = +-sqrt49`
`x = +-7`