Question

Which of the following is not quadratic equation?
(A) (x - 3) (2x + 2) = x (x + 5)
(B) (2x -1) (x - 3) = ( x 5) (x - 1
(C) x’ - 4x² - x + 1 = (x - 2)
(D) (x - 2) (x + 1) = (x-1) (x - 3)​

Answer 1

Answer:

(D) is not a quadratic equation

Step-by-step explanation:

It can be observed that the expansion of

(x - 2) (x + 1) = (x-1) (x - 3)​

would give the term x² on both the sides, which will then get cancelled leaving a linear equation.

For the other options, all will leave x² on one side only which is the requirement of  a quadratic equation.