Practice problem
Check all below that are quadratic functions.
(−2x)2=5(-2x)^2 = 5(−2x)2=5
h(x)=x+xh(x) = x+xh(x)=x+x
0=x2−40 = x^2 - 40=x2−4
3+3x+3x2=y3+3x+3x^2 = y3+3x+3x2=y
g(x)=2x+xg(x) = 2x+xg(x)=2x+x
f(x)=x2+1f(x) = x^2+1f(x)=x2+1
Type a concept, like “slope” or “photosynthesis”.