If a polynomial has only one variable then it is called polynomial in one variable. Some of the examples are as follows
P(x) = 2x3 + 5x – 3 is a polynomial of degree 3 and also known as a Cubic trinomial.
Q(x) = 7x7 – 5x5 – 3x3 + x + 3 polynomial of degree 7.
R(y) = y is a polynomial of degree 1 (one) and also known as a Linear polynomial or a Linear equation.
S(t) = t2 + 3 polynomial of degree 2 (Quadratic Binomial)
Please Note :
General form of a polynomial in one variable x of degree n is anxn + an–1xn–1 + an–2xn–2 + ......+ a2x2 + a1x + a0, an ≠ 0, where an, an–1,… a2, a1, a0 are all are constants.
For a linear equation : ax + b, a ≠ 0
For a quadratic eqaution : ax2 + bx + c, a ≠ 0
For cubic equation ax3 + bx2 + cx + d, a ≠ 0