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M34 Maths Lessons and Homework Site

Quadratic Equations and Quadratic Functions

Please complete and hand in on Monday 18 September:

Solve by factorising:

1.     x2 - 7x - 8 = 0

2.     x2 + x - 12 = 0

3.    3x2  + 11x + 6 = 0

4.   10x2 - 9x - 7 = 0

Complete the square, sketch graphs showing line of symmetry and coordinates of max or min point:

5.    y = x2 + 8x - 7

6.    y = 3x2 - 15x + 8

7.    y = -2x2 + 6x - 1

Solve using the quadratic formula giving roots to 3 sig fig:

8.   2x2 - 5x - 4 = 0

9.   3x2 + 8x + 4 = 0

10.  State the values of the discriminants in Q8 and Q9

 

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