Monomials 
9

x

9x

6xy

0.60x^{4}y

Not monomials 
y  6

x^{1} or 1/x

√(x) or x^{1/2}

6 + x

a/x

Polynomial 
Number of terms

Some examples

Monomial 
1

2, x, 5x^{3}

Binomial 
2

2x + 5, x^{2}  x, x  5

Trinomial 
3

x^{2} + 5x + 6, x^{5}  3x + 8

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Feb 17, 19 12:04 PM
There is no rational number whose square is 2. An easy to follow proof by contraction.