NZ Level 6 (NZC) Level 1 (NCEA)

## 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

#### NA6-5

Form and solve linear equations and inequations, quadratic and simple exponential equations, and simultaneous equations with two unknowns

#### 91027

Apply algebraic procedures in solving problems