## How to subtract mixed numbers that have unlike denominators | Fractions | Pre-Algebra | Khan Academy

Let’s try to evaluate 7 and 6/9 minus 3 and 2/5. So like always, I like to separate out the whole number parts from the

## Finding eigenvectors and eigenspaces example | Linear Algebra | Khan Academy

In the last video, we started with the 2 by 2 matrix A is equal to 1, 2, 4, 3. And we used the fact

## 2nd order linear homogeneous differential equations 3 | Khan Academy

In the last video we had this second order linear homogeneous differential equation and we just tried it out the solution y is equal to

## Simultaneous Equations (Algebra) – 2017 GCSE Higher-tier Maths question (solved by a 13-year-old)

Welcome to Mathematics Tube ðŸ™‚ I’m going to try a GCSE higher tier maths question, so the question is solve algebraically the simultaneous equations. To

## Worked example: Implicit differentiation | Advanced derivatives | AP Calculus AB | Khan Academy

Let’s get some more practice doing implicit differentiation. So let’s find the derivative of y with respect to x. We’re going to assume that y

## Equation – Given Two Points

(male narrator) In this video, we will look at how we can find the equation of a line if we are given two points on

## How to Add and Subtract Rational Expressions — College Algebra Tips

In this exercise we’re asked to subtract the rational expressions 3 over x minus six minus x plus 15 over x minus 6 times x

## Eigenvectors and eigenspaces for a 3×3 matrix | Linear Algebra | Khan Academy

In the last video we set out to find the eigenvalues values of this 3 by 3 matrix, A. And we said, look an eigenvalue

## Rational inequalities 2 | Polynomial and rational functions | Algebra II | Khan Academy

Let’s tackle a slightly harder problem than what we saw in the last video. I have here x minus 3 over x plus 4 is

## Example 2: Using the quadratic formula | Quadratic equations | Algebra I | Khan Academy

Use the quadratic formula to solve the equation, negative x squared plus 8x is equal to 1. Now, in order to really use the quadratic