12. A garage is x metres wide. It is 5 metres longer than it is wide. The area of the garage floor is 24m? Using this information, write a quadratic equation for the area of the floor.
Draw a graph of the equation in the domain --8 (1) What is significant about the two values x = -8 and x = 3, on the curve?
(ii) What is the only valid value of x? Explain your answer.