Question

prove that is quadratic​

Answer 1

Answer:

Step-by-step explanation:

x^3 + 6x^2 + 12x + 8= 2x^3 - 2x

x^3 - 2x^3 + 6x^2 +12x + 2x + 8 =0

- x^3 + 6x^2 + 14x + 8 =0

Therefore , it is not a quadratic