Check whether the given equation is quadratic equation or not?7x=2x×x

 solution:- 

Given Equation 7x=2x×x

 ⇒ 7x=2x²

 ⇒ 2x²-7x=0

this equation have a two degree so it is a Quadratic Equation  

 Quadratic Equation - 

The form of Quadratic Equation is ax²+ bx + c =0

a , b and c are real number

(Real number- (-∞ to ∞  ) it's read minus infinity to infinity  and its interval are available data only between minus infinity to infinity except at -∞,∞.)

in between (-∞ to ∞  ) is ........-5,-4,-3,-2,-1,√3,-√2, 0,√2,√3,1,2,3,4..........