# x in two places   15 videos

• #### Solving a System of Linear Equations in Two Variables

##### Algebra 2Systems of Linear Equations

How to solve a system of linear equations in two variables.

solving a system in two variables substitution elimination intersection parallel same line
• #### Proving Two Functions are Inverses

##### Algebra 2Inverse, Exponential and Logarithmic Functions

How to use algebra to show that two functions are inverses.

proving inverses composition
• #### Vocabulary of Quadratic Polynomials

##### Algebra 2Quadratic Equations and Inequalities

How to label the roots of a quadratic polynomial, solutions to a quadratic equation, and x-intercepts or roots of a quadratic function.

roots x intercepts solutions excluded values zeros function
• #### Function Notation

##### Algebra 2Functions

How to define function notation.

function notation f(x)
• #### Composition of Functions

##### Algebra 2Functions

How to calculate the composition of functions.

composition f(g(x))
• #### Finding an Inverse Graphically

##### Algebra 2Inverse, Exponential and Logarithmic Functions

How to graph the inverse of a function using points.

finding an inverse graphically switch x and y flip over y=x
• #### Midpoint Formula

##### Algebra 2Graphs of Linear Equations

How to find the midpoint of two points.

midpoint formula
• #### Multiplying Polynomials

##### Algebra 2Polynomials

How to multiply two binomials together.

multiplying polynomials foil binomial
• #### Finding an Inverse Algebraically

##### Algebra 2Inverse, Exponential and Logarithmic Functions

How to find the inverse of a function algebraically

finding an inverse one to one switch x and y
• #### Slope

##### Algebra 2Graphs of Linear Equations

How to find the slope between two points.

slope formula slope
• #### Evaluating Rational Exponents

How to evaluate a fractional exponent two ways.

evaluating rational exponents power over root
• #### Polynomial Function

##### Algebra 2Polynomials

How to evaluate a polynomial in function notation.

function notation f(x) polynomial constant linear quadratic cubic
• #### Applied Linear Equations: Distance Problem

##### Algebra 2Linear Equations

How to find the speed of transit when the time of two different legs is known.

distance rate time word problem