9.3.1 As with normal fractions, we need a common denominator
9.3.1.1 e.g 2/x+1/y
=2y/xy+x/xy
=2y+x/xy =2
10 Quadratic formula
10.1 If we have the quadratic equation ax^2+bx+c=0
the solutions can be found using this formula
11 Determining the nature of roots
11.1 We can use the discriminant to help
us determine the nature of the roots
11.2 There are 3 possibilites
11.2.1 If the discriminant>0 then we have 2 distinctive roots
11.2.1.1 If the discriminant=0 then we have no real roots
11.2.1.1.1 If the discriminant is<0 then we have no real roots
11.3 THE DISCRIMINANT
12 Solving Trig equations
12.1 To solve trig equations for angles use ASTC
which stand for acute angle, Sin, Cos and Tan
13 5 Figure summaries
13.1 for a set of data a five figure summary
consists of the following values; L-lowest value, Q-lower quartile, median, Q3- upper quartile, H-highest value