Complete the square

## Interactive practice questions

Find the missing values in this perfect square:

$x^2+4x+\editable{}=\left(x+\editable{}\right)^2$x2+4x+=(x+)2

Easy
Less than a minute

What term must we add to complete the square on $x^2+10x$x2+10x?

Determine the value of $c$c, the constant that should be added to $x^2-2x$x22x to make it a perfect square expression.

Complete the following so that it forms a perfect square

### Outcomes

#### 10D.QR3.05

Express y = ax^2 + bx + c in the form y = a(x – h)^2 + k by completing the square in situations involving no fractions, using a variety of tools