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KG1234

  • 3 years ago

solve by substituting a variable to simplify the equation: x^4+2x^2=8 How do i get the answer; + or - the square root of 2 and + or - 2i

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  1. slaaibak
    • 3 years ago
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    use the substitution k = x^2

  2. Outkast3r09
    • 3 years ago
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    \[x^4+2x^2-8=0\] \[u=x^2\] \[u^2+2u-8=0\\]

  3. KG1234
    • 3 years ago
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    how do i get the answer; + or - the square root of 2 and + or - 2i

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