Class 9 Maths Polynomials Variable and Constants

Variable & Constants: Variable is denoted by Symbol that can take any real values. E.g. x, y, z letters are used to denote variable. E.g. x is variable in polynomial     p(x)=ax2 − 8x + 9.

Value of constant remains same throughout a particular situation. E.g.  1, 2, 3 a, b, c etc. By conventions a, b,c are constants & x,y z are used as variables. Value of constant does not change in a given problem but value of variable keep changing. E.g. a, 8 & 9 are constant in the polynomial    p(x)=ax2 − 8x + 9.

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