document.write( "Question 275257: Solve for x: 4x^2-28=0 \n" ); document.write( "

Algebra.Com's Answer #200766 by checkley77(12844) $\"\"$ $\"About$

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4x^2-28=0 factor out the 4
\n" ); document.write( "4(x^2-7)=0
\n" ); document.write( "x^2-7=0 add 7
\n" ); document.write( "x^2=7 take the sqrt
\n" ); document.write( "x=sqrt7 or 2.64575 ans.
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