Question

In curve y= 2(x + a)(x + b) cuts the x-axis at points A and B where a and b are constants. Given that the coordinates of A and B are (-6,0) and (2,0) respectively, find the equation of the quadratic graph.

Answer 1

Make 2 equations.. and insert the respective set values given

Answer 2

y= 2(x + a)(x + b)

0 = 2(-6 + a)(-6 + b)

same as with second one

Answer 3

Thank you!

Answer 4

Np.

Answer 5

Hi sorry I still don't know how to carry on from there, do I expand 0=(2-6 + a)(-6 + b) and form a simultaneous equation? Very lost >< Thanks