How do you factorise quadratic equations by completing the square?
Divide the term in x by 2 and then put it in the bracket which will be squared. The last term from that expansion needs to be adjusted for.
DM
Related Maths GCSE answers
All answers ▸The circle c has equation x^2+y^2 = 1 . The line l has gradient 3 and intercepts the y axis at the point (0, 1). c and l intersect at two points. Find the co-ordinates of these points.
How to solve Simultaneous Linear Equations, e.g. (4x + 5y = 17) and (3x + 2y = 4)
Bhavin, Max and Imran share 6000 rupees in the ratios 2 : 3 : 7. Imran then gives 3/5 of his share of the money to Bhavin. What percentage of the 6000 rupees does Bhavin now have? Give your answer correct to the nearest whole number.
Expand the following: (4x+7)(7x-2)