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Some Common Symbols in the Book 1

Chapter 12 Quadratic Equation in One Variable 2

Ⅰ．Quadratic Equation in One Variable 4

12.1 Solving Quadratic Equations in One Variable by Formula 4

12.2 Solving Quadratic Equations in One Variable by Factoring 15

Have a Read A Quadratic Equation in One Variable in Our Ancient Time 19

12.3 The Discriminant of the Roots of Quadratic Equations in One Variable 21

12.4 The Relationship between the Roots and the Coefficients of Quadratic Equations in One Variable 24

12.5 The Factorization of a Trinomial of Degree Two(Solving by the Formula) 29

12.6 The Applications of Quadratic Equation in One Variable 33

12.7 Fractional Equation That Can Be Changed into Quadratic Equation in One Variable 37

Have a Read The Solution Method of Simple Equation of Higher Degree 44

Ⅱ．The Simple Systems of Quadratic Equations in Two Variables 47

12.8 The System Containing a Linear Equation in Two Variables and a Quadratic Equation in Two Variables 47

12.9 The System Containing a Quadratic Equation in Two Variables and Another System Which Can Be Factorized into Two Quadratic Equations in One Variable 51

Summary and Review 54

Review Exercise 12 58

Self-examination 12 61

Chapter 13 Functions and Their Graphs 62

13.1 Rectangular Coordinate System 64

13.2 Functions 70

13.3 Graphs of Functions 75

13.4 Linear Functions 81

13.5 The Graph and Properties of Linear Function 84

Have a Read The Graph Solution of System of a Linear Equations in Two Variable 89

13.6 Graphs of Quadratic Function y=ax2 92

13.7 Graphs of Quadratic Function y=ax2+bx+c 97

13.8 Inverse proportion Function and Its Graph 106

Summary and Review 111

Review Exercise 13 114

Self-examination 13 117

Chapter 14 Preliminary Statistics 119

14.1 Mean 121

14.2 Mode and Median 131

14.3 Variance 135

14.4 Calculate Mean,Standard Deviation and Variance by Using a Calculating Machine 147

14.5 Frequency Distribution 151

Have a Read How to Take Samples from Total Group 160

14.6 Field Work 163

Summary and Review 166

Review Exercise 14 169

Self-examination 14 172

Appendix Ⅰ Answer Key 174

Appendix Ⅱ Some Terms in the Book with Chinese Translation 186