Multiplying polynomials involves taking two or more polynomials and finding their product. A polynomial is an algebraic expression consisting of variables and coefficients, combined using addition, subtraction, and multiplication, but not division or exponentiation with non-negative integer exponents.

To multiply polynomials, you distribute each term of one polynomial across each term of the other polynomial(s), then combine like terms and simplify the resulting expression.

Explanation: For example, if you have two polynomials (a + b)(a + b) and (c + d)(c + d), you would multiply each term in the first polynomial by each term in the second polynomial: (a + b)(c + d) = ac + ad + bc + bd.