http://amcare.blogdrive.com/ addmath icare Fri, 22 Feb 2008 19:15:00 PST http://www.blogdrive.com Copyright 2008. http://amcare.blogdrive.com/archive/2.html Sat, 23 Feb 2008 03:08:19 GMT TRY THE EXERCISE BELOW : Challenge 1 Solve the quadratic equation 3x(x – 2) = 5 – x. Give your answer correct to three decimal places. The answer is : x = 2.370 or x = – 0.703 Able to get it , well done. If not, please try again.. Challenge 2 Solve the quadratic equation x 2 + 9x – 3 = 0 Give your answer correct to three decimal places. http://amcare.blogdrive.com/comments?id=2 http://amcare.blogdrive.com/archive/1.html Sat, 23 Feb 2008 02:47:28 GMT QUADRATIC EQUATIONS NOTES : The general form of a quadratic equation is ax^2 + bx + c = 0 , a, b, c are constants and a is not equal to 0. Characteristics of a quadratic equation : (a) involves only ONE variable (b) has an equal sign “ = ” , and can be expressed in the form ax^2 + bx + c = 0 (c) the highest power of the variable is 2 The roots of a Quadratic equation (a) “Root” refers to a specific value which satisfies the Q.E (b) Example : Given Quadratic equation x^2 + 2x - 3 = 0 By substitution, it is found that : when x = 1... (more) http://amcare.blogdrive.com/comments?id=1