Question

3. Which one of the following is not a quadratic equation?
a. (x+2)2=2(x+3)
b. x2+3x = (−1)(1−3x)2
c. (x+2)(x-1) = x2- 2x -5
d. x3- x2 + 2x +1 = (x+1)

Answer 1

Answer:

I think (a) will be the correct option.