CHAPTER 1 REAL NUMBER
To Understand what real numbers are. All you need to understand is the number line. Positive numbers to the right of zero, and negative numbers to the left of 0.
Any number that can be plotted on a number line is called a real number.
Let’s look at a few examples, say -2. it can be plotted on the number line. It’s this point 0-2 is a real number. What about 0.5? Even though it’s not an integer, it can be plotted on the number line. It will be somewhere 1 and 2.
The digits after the decimal point do not end these kinds of numbers are called Non-terminating decimal numbers. And yes, these numbers two can be plotted on the number line. Plotting a non-terminating number might sound weird, but yes it’s possible. So
Now let’s talk a bit about the different kinds of numbers we know. The first kind is numbered with Terminating decimals numbers like 0.375. The number stops at a point and does not go on and on. Then we have non terminating recurring decimals. Numbers like 0.6666 and so on the sixes don’t end. It’s called recurring since the same number re-occurs and non-terminating since it reoccurs infinitely. And the third type is Non terminating non-recurring decimals.
CHAPTER 2 POLYNOMIALS
Polynomial is an algebraic expression with power as whole numbers. There are different types of polynomials based on their powers, such as constant linear, quadratic, cubic, etc.
A polynomial of degree zero is called a constant polynomial and Whereas the polynomial of degree, one is called linear polynomial, quadratic and cubic polynomials, or the polynomials of degree two and three, respectively.