Quadratic equations introduction to quadratic equation actvity 2

=Activity - Name of Activity= Rectangular garden A gardner wants his garden to have a geometrical shape. He decides on the following rules for building the flowerbeds. How many different flower beds can the gardener make if one of the sides ia 3 units less than the other side.
 * 1) They must all be rectangular
 * 2) The perimeter and area must be the same.

How many different flower beds can the gardener make if both the sides are of same length.

Estimated Time
30min

Materials/ Resources needed
paper and pen

Prerequisites/Instructions, if any
Students need to use their own strategies to solve the equations. Students may, for example establish a set of equivalent quadratic equations through the balancing method which they are familiar in the context of linear equations.

Multimedia resources
nil

Process (How to do the activity)
draw suitable diagram for the problem.

Developmental Questions (What discussion questions)
How to find the area and perimeter of the rectangle? The aim of this activity is to make a situation that leads to the quadratic equation- x(x-3)=4x-6 x^2=4x/math> Students need to use their own strategies to solve the equations. Students may, for example establish a set of equivalent quadratic equations through the balancing method which they are familiar in the context of linear equations. x^2-3x = 4x-6 => x^2-7x= -6/math> x^2-4x = 0/math> However ,students will probably have no other methods available but to solve using numerical method. They might set up tables from original eqn.

They need to be encouraged to move through the numbers to find the solutions and to make sense of the solution. It also needs to be made explicit here that we are now dealing with an equation that involves a term with an unknown of second degree. This is one feature that distinguishes it from linear equation. $$x^2 =4x  by  x$$ x=4
 * 1) note- In using the balancing method pupil might very well divide both sides of equation

Evaluation (Questions for assessment of the child)

 * 1) how many roots does the linear equation can have?

Question Corner

 * 1) Can this equation has any other solutions?

Activity Keywords
To link back to the concept page Quadratic_Equations