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If AB=BC=CD then the difference between each of the points is the same. If we look at the difference between A and B we can see that B is 6 further to the right, and 3 further up. So if we then add (6,3) ...

b - 6 = 13Add 6 to both sides of the equationb - 6 + 6 = 13 + 6Therefore:b = 19

First, you need to factorise the quadratic:x²-3x-4=0(x-4)(x+1)=0Then, set each of the brackets to equal 0 and solve for x:x-4=0 --> x = 4x+1=0 --> x=-1

We factorise the equation by completing the square.Take y=x² + ax + bWhen we complete the square we have y= (x+1/2a)²-a²+b which is y= (x+1/2a)² + c where c = -...

The two common ways to approach them is either by substitution or addition/subtraction. Firstly, for substitution, rearrange one of your equation so that one of the unknowns becomes the subject and then ...