Math Fractions & Equations : Adding & Subtracting Rational Expressions

When adding and subtracting rational expressions, the implication is that there is a variable on the bottom. Use common denominators when adding and subtracting rational expressions with help from a math author and teacher in this free video on math lessons.

Expert: Brian Leaf
Contact: www.brianleaf.com
Bio: Brian Leaf, MA, is the author of McGraw-Hill's Top 50 Skills for SAT/ACT Success series and has instructed SAT, ACT, GED and SSAT preparation to thousands of students.
Filmmaker: David Pakman

Category:

Howto & Style

Tags:

• math
• mathematics
• math tips
• math lessons
• equations
• math fractions
• polynomials
• teaching math
• math skills
• fractions

[marinocastillo]

This guy, is so awesome, he can take down mountians of equations with just a flick of his pen, he is so great, that he can split the world of math in half with his pinky LOL But seriously man great work! :D

[Sclippers14]

Great teacher.

[lavaskul]

he makes me wanna start loving maths

[paul113z]

to be honest, this guy teaches better than my grade 11 math teacher

[GabinRevolution]

That was really helpful... Now all I need is to not have a problem with 63777467 terms to multiply together....

[MrChunkyisawesome]

@marinocastillo he's the chuck norris of math

[ceking2013]

haha his writing is so slanted. I have a test tommorow though and I think this guy might save me from an F.... score!

[Exzibionperez]

HE LOOKS LIKE A HAIRY VERSION OF SEA NANNERS

[harajukugirlxx3]

i have a quiz tomorrow and this was my last resort. i now am not 100 percent clueless. good job.

[jksareawsome123]

I Have homework to do... Why am i watching this?

[caiti214]

jesus christ, im in college precalculus and i have to come on youtube to learn... so sad. if only my teacher would just slow down and actually notice my hand waving frantically in the air trying to ask for help. oh well hopefully i will do better after watching all of this guy's playlist.

[17softgrl]

Wow thanks :D