Question

Solve quadratic by square root

Answer 1

I think it 2/5 or -2/5

Answer 2

`\frac25` and
`-\frac25`

Explanation:

Hello!

The square root method is the process of square rooting both sides of the equation.

Solve for x

• 
  `25x^2 = 4`
• 
  `√(25x^2) = \sqrt4`

When you square root a number that is being squared (x^2), it is the absolute value of that number. Meaning that you keep a plus or minus sign on the other side.

• 
  `√(25x^2) = \sqrt4`
• 
  `5x = \pm 2`
• 
  `x = \pm \frac25`

The roots of the equation are
`\frac25` and
`-\frac25`.