document.write( "Question 550114: What is the minimum value of 2x^2-8x+7 ? \n" ); document.write( "
Algebra.Com's Answer #358464 by prateekagrawal(56)\"\" \"About 
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2x^2 -8x+7
\n" ); document.write( "=2(x^2 -4x) +7
\n" ); document.write( "= 2(x^2 -4x +4 -4) +7
\n" ); document.write( "= 2(x^2 -4x +4) -8+7
\n" ); document.write( "= 2(x-2)^2 -1
\n" ); document.write( "when x=2
\n" ); document.write( ".
\n" ); document.write( "its 2(0)^2 -1
\n" ); document.write( "= -1
\n" ); document.write( "so, -1 is the minimum value of this. \n" ); document.write( "
\n" );