Solving radical equations 3 | Exponent expressions and equations | Algebra I | Khan Academy

Solving Radical Equations 3

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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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[bobfrasier]

This video helps a lot. I had a math test and it helped me get a good grade.

[confrontingchaos]

I actually really liked the green color.

[iiAngelic]

do you have an example where on one side there is a radical and a number outside the radical and on the other side there's another radical....like per se √(x+2)+1=√(3-x) and you solve for x

[justin]

How do you know when somethings a quadratic equation?

[SuperLameoo]

Why make it so complicated, just from the second step make the whole equation equals 0 so u will have 5x^2-4x^2 so it will be x^2 - 8=0 and then move the 8 so it will be positive and then x will be equal to radical 8 which will equal to 2 radical 4.

[meJevin]

doesn't this equasion have two solutions? when you say x^2 = 8, the obvious answer is x = +-sqrt(8)