Quadratic Equations

Hong Kong

Stage 4 - Stage 5

Solve the equation $x^2=25$`x`2=25.

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

Easy

Less than a minute

Solve the following equation for $x$`x`:

$x^2=81$`x`2=81

If $u^2=d$`u`2=`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?

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