Quadratic Equations

Hong Kong

Stage 4 - Stage 5

Below is the result after using the quadratic formula to solve an equation.

$x=\frac{10\pm\sqrt{-1}}{8}$`x`=10±√−18

The equation has two real solutions.

A

The equation has one real solution.

B

The equation has no real solution.

C

Easy

Less than a minute

How many solutions are there to the equation $x^2=9$`x`2=9?

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