http://mathcare.blogdrive.com/ modernmath Fri, 22 Feb 2008 20:25:02 PST http://www.blogdrive.com Copyright 2008. School http://mathcare.blogdrive.com/archive/2.html Sat, 23 Feb 2008 04:04:03 GMT CHAPTER 2 Quadratic Expressions and Equations http://mathcare.blogdrive.com/archive/3.html Sat, 23 Feb 2008 04:04:03 GMT Quadratic Expressions and Equations http://mathcare.blogdrive.com/archive/4.html Sat, 23 Feb 2008 04:04:03 GMT CHAPTER 2 Quadratic Expressions and Equations · Quadratic expressions in the form ax² + bx + c, where a, b and c are constants, a ≠ 0 and x is an unknown. · Quadratic expressions can be formed by multiplying two linear expressions. ( x + a ) ( x + b ) = x² + bx + ax + ab · Factorisation of Quadratic Expressions 1. ax2 + bx 3. x² + bx + c = x ( ax + b) = ( x + m ) (x + n ) Example: Example : 3x2 + 2x x² + 3x + 2 = x ( 3x + 2) ... (more) http://mathcare.blogdrive.com/comments?id=4 http://mathcare.blogdrive.com/archive/1.html Sat, 23 Feb 2008 02:08:55 GMT HOMEWORK CHAPTER 1 Chapter 1 Standard Form · Rounding off positive numbers to a given number off significant figures Significant figures refer to the digits of a number that is relevant to its precision. The significant figures are as follows : Example : 20 000 ( 1 significant figure ) 36 000 ( 2 significant figures) 123 (3 significant figures ) 9763 ( 4 significant figures ) For the decimal, all digits after the first significant figure are significant figures. For example : The significant figures of 0.007 389 are as follows : ... (more)