# Solve quadratics by algebraic manipulation

## Interactive practice questions

Solve the following equation for $x$x:

$x^2=25$x2=25

Write all solutions on the same line, separated by commas.

Easy
Less than a minute

Solve the following equation for $x$x:

$x^2=81$x2=81

If $u^2=d$u2=d, what does the square root property state that $u$u is equal to?

A quadratic equation has solutions $x=\pm5$x=±5. What must the equation be?

### Outcomes

#### 10D.QR4.01

Determine the zeros and the maximum or minimum value of a quadratic relation from its graph or from its defining equation