document.write( "Question 42496: 2x^2-9x-9 grrr this was given to my little brother as homework who is 2 years younger than me i havnt done quadratic eqautions for ages please help \n" ); document.write( "
Algebra.Com's Answer #27626 by askmemath(368)\"\" \"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 \"2x%5E2%2B-9x%2B-9+=+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=%28-9%29%5E2-4%2A2%2A-9=153\".
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\n" ); document.write( " Discriminant d=153 is greater than zero. That means that there are two solutions: \"+x%5B12%5D+=+%28--9%2B-sqrt%28+153+%29%29%2F2%5Ca\".
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\n" ); document.write( " \"x%5B1%5D+=+%28-%28-9%29%2Bsqrt%28+153+%29%29%2F2%5C2+=+5.34232921921325\"
\n" ); document.write( " \"x%5B2%5D+=+%28-%28-9%29-sqrt%28+153+%29%29%2F2%5C2+=+-0.842329219213245\"
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\n" ); document.write( " Quadratic expression \"2x%5E2%2B-9x%2B-9\" can be factored:
\n" ); document.write( " \"2x%5E2%2B-9x%2B-9+=+2%28x-5.34232921921325%29%2A%28x--0.842329219213245%29\"
\n" ); document.write( " Again, the answer is: 5.34232921921325, -0.842329219213245.\n" ); document.write( "Here's your graph:
\n" ); document.write( "\"graph%28+500%2C+500%2C+-10%2C+10%2C+-20%2C+20%2C+2%2Ax%5E2%2B-9%2Ax%2B-9+%29\"
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