If a polynomial has only one variable then it is called polynomial in one variable. Some of the examples are as follows

P(x) = 2x^{3} + 5x – 3 is a **polynomial of degree** 3 and also known as a **Cubic trinomial.**

Q(x) = 7x^{7} – 5x^{5} – 3x^{3} + 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) = t^{2} + 3 polynomial of degree 2 (Quadratic Binomial)

**Please Note :**

**General form of a polynomial** in one variable x of degree n is a_{n}x^{n} + a_{n–1}x^{n–1} + a_{n–2}x^{n–2} + ......+ a_{2}x^{2} + a_{1}x + a_{0}, a_{n} ≠ 0, where a_{n}, a_{n–1},… a_{2}, a_{1}, a_{0} are all are constants.

For a linear equation : ax + b, a ≠ 0

For a quadratic eqaution : ax^{2} + bx + c, a ≠ 0

For cubic equation ax^{3} + bx^{2} + cx + d, a ≠ 0

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