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To factorise polynomials of the form ax^2 + bx + c, we want to rewrite the middle coefficient as the sum of ...

Gven the radii of the circles meet at right angles then a right angled triangle can be constructed were the hypotenuse is the distance between the centres. Using the Pythagorean triplet, the hypotenuse is...

H:F F:B7:4 8:550 bungalows, so bungalows have been multiplied by 10 to get from 5 to 50. So now we have to do the same process to the flats so we multiply 8 by 10 to get 80 flats. Now we need to get to 80...

X=1/2X=3

x²-4x-3 First factorise into squared form and expand.(x-2)²=x²-4x+4Balance the equations.x²-4x+4 needs to be x²-4x-3This leads to(x-2)²-4-...