document.write( "Question 763084: Complete the square (step by step) for: 2x^2-4x+11. I can figure out up to:
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document.write( "2(x^2-2x)+11
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document.write( "2(x^2-2x+1)-1+11
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document.write( "2(x-1)^2+10
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document.write( "But, the answer in the book says: 2(x-1)^2+9. I can't figure out how it's a 9 instead of 10. Help!
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Algebra.Com's Answer #464467 by Cromlix(4381)![]() ![]() You can put this solution on YOUR website! Hi there, \n" ); document.write( "You are almost right. \n" ); document.write( "2x^2 - 4x + 11 \n" ); document.write( "2(x^2 - 2x + 11 \n" ); document.write( " (-2/2)^2 = 1 \n" ); document.write( "2(x^2 - 2x + 1) (2 * -1) + 11 \n" ); document.write( "2(x - 1)^2 + 9 \n" ); document.write( "Don't forget to multiply the \n" ); document.write( "number by 2 that you are taking \n" ); document.write( "across to add to the right \n" ); document.write( "hand side. \n" ); document.write( "Hope this helps. \n" ); document.write( ":-) \n" ); document.write( " |