Work out the points of intersection of the graphs of y= (x+2)(x-4) and y=3x+6.
3x+6=(x+2)(x-4)
3x+6 = x2-2x-8
x2-5x-14=0
(x-7)(x+2)=0
x=7 so y=27
and x=-2 so y=0
EL
Related Maths GCSE answers
All answers ▸Solve the simultaneous equations;5x +y = 21 and x-3y=9
x + y = 11, and x^2 + y^2 = 61, Work out values of y in the form of x
Factorize x³-x
A cylinder has dimensions: diameter = 4x+2 and height = 4. Work out the volume of this cylinder. Give your answer in terms of x