CBSE IX Maths Quick Review Chapter Wise
#1
Decimal Expansion of Real Numbers : The decimal expansion of real
number is used to represent a number on the number line.
If the decimal expansion of a real number is either terminating or non-terminating recurring, then the real number is called a rational number.

If a given number is transformed into an equivalent form, such that the denominator is a rational number then the process is known as Rationalization.
Rationalizing the denominator : If the denominator of a fraction contains a term with root (a number under a radical sign), the process of converting it to an equivalent expression with rational denominator is called as rationalizing the denominator.

Zero Polynomial : Also, the constant polynomial is called the zero polynomial and the degree of the zero polynomial is not defined.
Degree of a Polynomial : Highest power of variable in a polynomial is called the ‘degree of polynomial’.
In One Variable : In polynomial of one variable, the highest power of the variable is called the degree of the polynomial.

For details visit the link attached below..


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