Class 9 / IIT Foundation Plus Maths / Quadratic Expressions-II / Short tricks for calculating various forms of quadratic equation

Quadratic Expressions-II

Quadratic Expressions-II Shorttricks for calculating various forms of quadratic equation: i)    If af(x) +bf(x) = a+b and ab=1 then f(x)= 1 EX: If  then the value of x are