document.write( "Question 1089760: in completing the square for the following problem, Jules and Vincent are trying to find their error as they are disagreeing on the answer. Describe the error(s) made in the process and solve the problem correctly. Upload your solution for your instructor to grade. \r
\n" ); document.write( "\n" ); document.write( "step 1: x^2+8x=0
\n" ); document.write( "step 2: x^2+8x+8=0+8
\n" ); document.write( "step 3: (x+4)^2=8
\n" ); document.write( "step 4: x+4=2\sqrt{2}
\n" ); document.write( "step 5: x=-4=-2\sqrt{2} \n" ); document.write( "

Algebra.Com's Answer #704129 by MathLover1(20850) $\"\"$ $\"About$

You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "step 1: $\"x%5E2%2B8x=0\"$
\n" ); document.write( "step 2: $\"x%5E2%2B8x%2B8=0%2B8\"$ -> here is error;Jules and Vincent added $\"8\"$ , but they needed to add $\"16\"$ or $\"4%5E2\"$ because coefficient $\"2ab=8\"$ ; since $\"+a=1\"$ -> $\"2b=8\"$ -> $\"b=8%2F2\"$ -> $\"b=4\"$ , then we add $\"b%5E2\"$ or $\"4%5E2\"$ and we get $\"x%5E2%2B8x%2B4%5E2=0%2B4%5E2\"$ -> $\"x%5E2%2B8x%2B16=16\"$
\n" ); document.write( "step 3: $\"%28x%2B4%29%5E2=8\"$ ...should be $\"%28x%2B4%29%5E2=16\"$
\n" ); document.write( "step 4: $\"x%2B4=2sqrt%282%29\"$ ...should be $\"%28x%2B4%29=sqrt%2816%29\"$ -> $\"%28x%2B4%29=4\"$ or $\"%28x%2B4%29=-4\"$
\n" ); document.write( "step 5: x=-4=-2\sqrt{2}.... $\"x=4-4\"$ -> $\"x=0\"$ or $\"x=-4-4\"$ -> $\"x=-8\"$ \n" ); document.write( "

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