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the lenght of ladder is contant. when it is in the middle of sliding, it make a right angle triangle with the floor and wall, hence (the lenght of the ladder£^2  equal to (the lenght of floor to one en...

A function is a notion somewhat abstract to the non-experienced reader, but can be explained as follows:

You have a domain - that is a set, e.g. the set of all yellow birds. You also have...

Take the example 2x² + 7x + 3 = 0

1. To factorise we need to use the general equation 'ax + bx - c = 0'   where in our case a = 2 b =7 c=3.

2. First we need to mulitply the ...