document.write( "Question 662032: I need to find all real solutions of the equation, correct to two decimals for the equation. I think I need to solve it graphically, but I have no idea how. x^4-8x^2+2=0 \n" ); document.write( "

Algebra.Com's Answer #411896 by stanbon(75887) $\"\"$ $\"About$

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I need to find all real solutions of the equation, correct to two decimals for the equation. I think I need to solve it graphically, but I have no idea how. x^4-8x^2+2=0
\n" ); document.write( "------
\n" ); document.write( "Use the Quadratic Formula:
\n" ); document.write( "x^2 = [8 +- sqrt(64-4*2)]/2
\n" ); document.write( "---
\n" ); document.write( "x^2 = [8 +- sqrt(56)]/2
\n" ); document.write( "----
\n" ); document.write( "x^2 = [4 +- 2sqrt(14)]
\n" ); document.write( "---
\n" ); document.write( "x^2 = [4+2sqrt(14)] or x^2 = [4-2sqrt(14)]
\n" ); document.write( "----
\n" ); document.write( "Now solve for \"x\":
\n" ); document.write( " $\"graph%28400%2C400%2C-10%2C10%2C-10%2C10%2Cx%5E4-8x%5E2%2B2%29\"$
\n" ); document.write( "==================================================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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