Practice problem
Which of the following is a quadratic equation?
y=2y = 2y=2
y=xy=xy=x
0=x2+4x+20 = x^2 + 4x + 20=x2+4x+2
0=x3+4x+20 = x^3 + 4x + 20=x3+4x+2
Type a concept, like “slope” or “photosynthesis”.
