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3x+7 = 1. We can describe this equation as a stroy. First x was multiplied by 3 and then 7 was added to it to get 1. Now we need to reverse the story. 
last thing done was +7, so reversing it gives ...

(x-5)(x-3)=0

x-5=0 x-3=0

x=5 x=3

Use the moon method.

E.g. (x+1)(x+2) 

1. multiply x with x

2. multiply x with 2

3. mutiply 1 with x

4. multiply 1 with 2

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From the format of the equation, we know this graph is a straight line because it follows the form, y=mx+c. The coefficent of x (the number before x) describes the gradient of the straight line or m. This...