document.write( "Question 952029: x^2 - 60x - 2700 = 0 solve by quadratic formula i.e. D=b^2-4ac
\n" ); document.write( " x=(-b+/-√(d))÷2a \n" ); document.write( "
Algebra.Com's Answer #581416 by macston(5194)\"\" \"About 
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\"x%5E2+-+60x+-+2700+=+0\"\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( "
Solved by pluggable solver: SOLVE quadratic equation with variable
Quadratic equation \"ax%5E2%2Bbx%2Bc=0\" (in our case \"1x%5E2%2B-60x%2B-2700+=+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=%28-60%29%5E2-4%2A1%2A-2700=14400\".
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\n" ); document.write( " Discriminant d=14400 is greater than zero. That means that there are two solutions: \"+x%5B12%5D+=+%28--60%2B-sqrt%28+14400+%29%29%2F2%5Ca\".
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\n" ); document.write( " \"x%5B1%5D+=+%28-%28-60%29%2Bsqrt%28+14400+%29%29%2F2%5C1+=+90\"
\n" ); document.write( " \"x%5B2%5D+=+%28-%28-60%29-sqrt%28+14400+%29%29%2F2%5C1+=+-30\"
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\n" ); document.write( " Quadratic expression \"1x%5E2%2B-60x%2B-2700\" can be factored:
\n" ); document.write( " \"1x%5E2%2B-60x%2B-2700+=+1%28x-90%29%2A%28x--30%29\"
\n" ); document.write( " Again, the answer is: 90, -30.\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-60%2Ax%2B-2700+%29\"
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