Subtracting and simplifying radicals | Exponent expressions and equations | Algebra I | Khan Academy

Subtracting and Simplifying Radicals

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Algebra I on Khan Academy: Algebra is the language through which we describe patterns. Think of it as a shorthand, of sorts. As opposed to having to do something over and over again, algebra gives you a simple way to express that repetitive process. It's also seen as a "gatekeeper" subject. Once you achieve an understanding of algebra, the higher-level math subjects become accessible to you. Without it, it's impossible to move forward. It's used by people with lots of different jobs, like carpentry, engineering, and fashion design. In these tutorials, we'll cover a lot of ground. Some of the topics include linear equations, linear inequalities, linear functions, systems of equations, factoring expressions, quadratic expressions, exponents, functions, and ratios.

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[scale-]

wow. 13 years ago and it still works just fine! Crazy how much Sal's mic quality has improved

[alexhewitt]

Couldnt we simplify further by factoring out the |x| at the end?

[lillsterxo]

but what if you had to break down 18 ? 
would it just be 3.3.2 ?
Because 6*3 is 18, but then you break down 6 and get 2*3 

so now im left with 3, 3, 2 ? 
Now what do i put it as? ><

[ostdog]

How could I simplify the square root of (6-4x) when x is root 2