Answers>Maths>GCSE>Article

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

Answered by Edward L. • Maths tutor

5405 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

For the equation y=2x+7, what is the gradient and the y intercept?

If 5x + 3y = 27 and 6x - 2y = 10, find x and y

Solve 7(k – 3) = 3k – 5

Solve 5w – 3 = 3w + 15