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Math Help - square root equation

  1. #1
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    square root equation

    I really don't get what I'm supposed to do with this problem. If someone could show me the steps, that would be great.

    radical (x + 1) = x - 1

    (that's supposed to be a radical sign over the x+1)
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by SwissArmelle View Post
    I really don't get what I'm supposed to do with this problem. If someone could show me the steps, that would be great.

    radical (x + 1) = x - 1

    (that's supposed to be a radical sign over the x+1)
    square both sides and solve for x. then check your solutions in the original equation to make sure none are extraneous
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  3. #3
    Math Engineering Student
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    \begin{aligned}<br />
\sqrt {x + 1} &= x - 1\\<br />
x + 1 &= x^2 - 2x + 1\\<br />
x^2 - 3x &= 0\\<br />
x(x - 3) &= 0\\<br />
x_2 &= 3<br />
\end{aligned}


    Greetings

    (see why x=0 is refused)
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