Search over 10,000 free study notes

9x - 6x²+ 6 - 4x-6x² + 5x + 6

1/4+2/4=3/4

Never in a GCSE syllabus, but still a question I had as a student and one I hear today- something, I feel, is worth going over (Similar in a sense to proving that completing the square works). We use the ...

Equate the two graphs:x²+7x+14=2x+8Rearrange to find a single quadratic:x²+5x+6=0Factorize and solve:(x+2)(x+3)x=-2 x=-3Sub x values into one of the original graphs to find y:(-2,...

Firstly, it's important to understand what the formula is. It is essentially a re-arrangement of a quadratic equation, however the formula can be learnt so that it can be applied quickly within an exam co...