Quadratic Expression and Equation

introduction

In this part we will explain the meaning of Quadratic expression and equation so as to make you bright understanding on next lesson:

Before we continue, let’s check the meaning of expression.

In mathematics we have something called term; a term is a single number or letter that expresses something. For example. 5, 2x, 1.9, ¹/₂, etc. all these are terms. Read more ..........

APPROXIMATION IN CALCULATION

It is another part where we approximate before we calculate certain operation such as 45 x 68, 4.65 x 87.2 and some like that.

How do we approximate? And what are the rules?

It is simple,

For all whole numbers approximate to the nearest large value such as 45667 to ten thousands to become 50000, 45 to the nearest tens to become 50 and 522 to hundreds to become 500. Read More ........

SIGNIFICANT FIGURE

When given a number, the digits in it are called significant figures and are obtained by counting from left to the right of the number but zeros to the left or right are not counted, but if zero appears between two digits it will be counted as a significant figure as other digits. Read More .........