document.write( "Question 443383: I need help to see the steps to solving this quadratic equation x^ + 12x – 64 = 0 using the method from India \n" ); document.write( "
Algebra.Com's Answer #305821 by swincher4391(1107)\"\" \"About 
You can put this solution on YOUR website!
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Solved by pluggable solver: SOLVE quadratic equation with variable
Quadratic equation \"ax%5E2%2Bbx%2Bc=0\" (in our case \"1x%5E2%2B-12x%2B-64+=+0\") has the following solutons:
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\n" ); document.write( " \"x%5B12%5D+=+%28b%2B-sqrt%28+b%5E2-4ac+%29%29%2F2%5Ca\"
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\n" ); document.write( " For these solutions to exist, the discriminant \"b%5E2-4ac\" should not be a negative number.
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\n" ); document.write( " First, we need to compute the discriminant \"b%5E2-4ac\": \"b%5E2-4ac=%28-12%29%5E2-4%2A1%2A-64=400\".
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\n" ); document.write( " Discriminant d=400 is greater than zero. That means that there are two solutions: \"+x%5B12%5D+=+%28--12%2B-sqrt%28+400+%29%29%2F2%5Ca\".
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\n" ); document.write( " \"x%5B1%5D+=+%28-%28-12%29%2Bsqrt%28+400+%29%29%2F2%5C1+=+16\"
\n" ); document.write( " \"x%5B2%5D+=+%28-%28-12%29-sqrt%28+400+%29%29%2F2%5C1+=+-4\"
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\n" ); document.write( " Quadratic expression \"1x%5E2%2B-12x%2B-64\" can be factored:
\n" ); document.write( " \"1x%5E2%2B-12x%2B-64+=+1%28x-16%29%2A%28x--4%29\"
\n" ); document.write( " Again, the answer is: 16, -4.\n" ); document.write( "Here's your graph:
\n" ); document.write( "\"graph%28+500%2C+500%2C+-10%2C+10%2C+-20%2C+20%2C+1%2Ax%5E2%2B-12%2Ax%2B-64+%29\"
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