Practice problem
Which of the following are polynomials? (You may choose more than one.)
x2+5x+6x^2 + 5x + 6x2+5x+6
x2−5x+6x^2 - 5x + 6x2−5x+6
x−2−5x5+10x^{-2} - 5x^5 + 10x−2−5x5+10
x6−5x+7x^6 - 5x + 7x6−5x+7
1x2+3x\frac{1}{x^2} + 3xx21+3x
x12+1x^{\frac{1}{2}} + 1x21+1
Type a concept, like “slope” or “photosynthesis”.