
Solving equations & inequalities | Algebra 1 | Math | Khan Academy
There are lots of strategies we can use to solve equations. Let's explore some different ways to solve equations and inequalities. We'll also see what it takes for an equation to have no …
Worked example: Evaluating functions from equation
Evaluating functions allows us to find what the function's value is given a certain input. When you write f(x), it tells us that there's a function called f whose output value comes from input called x.
Algebra 1 | Math | Khan Academy
The Algebra 1 course, often taught in the 9th grade, covers Linear equations, inequalities, functions, and graphs; Systems of equations and inequalities; Extension of the concept of a …
Quadratic equations & functions | Algebra (all content) | Khan …
This topic covers: - Solving quadratic equations - Graphing quadratic functions - Features of quadratic functions - Quadratic equations/functions word problems - Systems of quadratic …
Quadratic functions & equations | Algebra 1 | Math | Khan Academy
We've seen linear and exponential functions, and now we're ready for quadratic functions. We'll explore how these functions and the parabolas they produce can be used to solve real-world …
Substitution method review (systems of equations) - Khan Academy
The substitution method is a technique for solving a system of equations. This article reviews the technique with multiple examples and some practice problems for you to try on your own.
Solving exponential equations using logarithms - Khan Academy
Learn how to solve any exponential equation of the form a⋅b^ (cx)=d. For example, solve 6⋅10^ (2x)=48. The key to solving exponential equations lies in logarithms! Let's take a closer look by …
Linear equations, functions, & graphs | Khan Academy
This topic covers: - Intercepts of linear equations/functions - Slope of linear equations/functions - Slope-intercept, point-slope, & standard forms - Graphing linear equations/functions - Writing …
Solving equations by graphing: intro (video) | Khan Academy
Some equations are hard to solve exactly with algebraic tools. We can always solve an equation by graphing it, although the solution might not be exact. This is an example of how to solve a …
Rational equations intro (video) | Equations | Khan Academy
Video transcript - [Instructor] Let's say we wanna solve the following equation for x. We have x plus one over nine minus x is equal to 2/3. Pause this video and see if you can try this before …