A cubic binomial is a polynomial expression that consists of two terms, where the highest degree of the variable is three. It generally takes the form:
ax³ + bx²
where a and b are coefficients, and the variable is raised to the third power. An example of a cubic binomial is:
2x³ + 3x
In this expression, 2x³ is the cubic term, and 3x is the linear term. The presence of the x raised to the power of three indicates that it is cubic. Cubic binomials can be factored or expanded, and they often appear in various areas of algebra, including solving equations and graphing functions.