# Evaluating polynomials

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##### Examples
###### Lessons
1. Evaluating polynomials
1. When ${ 4x^2-3 }$ is evaluated for ${x=5,}$ what is the result?
2. Find the value of "${-x^4-3x^3}$" when ${x=-3}$
2. Find the value of the following polynomials, given $a = 2$ and $b = 5$.
1. $\frac{1}{2}a^3-3b$
2. $3ab+5b^2-10a$
3. $a^2b^2-3ab$
###### Topic Notes
The unknowns in the polynomials actually represent numbers. What do we do when we know these numbers and plug them into the polynomials? Let's practice here in this section.