Practice problem
If the function f(x)=ax3+bx2+cx+df(x)=ax^3+bx^2+cx+df(x)=ax3+bx2+cx+d is quadratic, what do we know about the value of aaa?
aaa is positive
aaa is negative
aaa is nonzero
aaa is zero
Type a concept, like “slope” or “photosynthesis”.