Question

Which is a quadratic equation?

• A. $$x^3-4x+5=0$$
• B. $$(p-q)^2-q^2+2pq-p=-3$$
• C. $$x-x^3+3x^2-5=0$$
• D. $$(x+3)^2=0$$

Answer 1

Answer:

$$(x+3)^2=0$$

The equation $(x + 3) ^2 = 0$ represents a quadratic form with degree 2 in variable x.