document.write( "Question 291932: solve using the quadratic formula. round your answer to the nearest hundredth. \r
\n" ); document.write( "\n" ); document.write( " $\"2x%5E2-4x-3=0\"$
\n" ); document.write( "-----here's my try.------
\n" ); document.write( "step 1: x=-(-4)ą√2^2-4(2)(-3)/2(2)
\n" ); document.write( "step 2: x=4ą√4+24/4
\n" ); document.write( "step 3: x=4ą√28/4
\n" ); document.write( "i don't know what to do past there. please help me, thank you. \n" ); document.write( "

Algebra.Com's Answer #210985 by richwmiller(17219) $\"\"$ $\"About$

You can put this solution on YOUR website!
You should write out the formula and be more clear and not run things together.
\n" ); document.write( "You used 2^2 instead of 4^2
\n" ); document.write( "you had a^2-4ac
\n" ); document.write( " $\"%28-b%2B-+sqrt%28b%5E2-4%2Aa%2Ac%29%29%2F%282%2Aa%29\"$
\n" ); document.write( "\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 $\"2x%5E2%2B-4x%2B-3+=+0\"$ ) 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 $\"b%5E2-4ac\"$ : $\"b%5E2-4ac=%28-4%29%5E2-4%2A2%2A-3=40\"$ .
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\n" ); document.write( " Discriminant d=40 is greater than zero. That means that there are two solutions: $\"+x%5B12%5D+=+%28--4%2B-sqrt%28+40+%29%29%2F2%5Ca\"$ .
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\n" ); document.write( " $\"x%5B1%5D+=+%28-%28-4%29%2Bsqrt%28+40+%29%29%2F2%5C2+=+2.58113883008419\"$
\n" ); document.write( " $\"x%5B2%5D+=+%28-%28-4%29-sqrt%28+40+%29%29%2F2%5C2+=+-0.58113883008419\"$
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\n" ); document.write( " Quadratic expression $\"2x%5E2%2B-4x%2B-3\"$ can be factored:
\n" ); document.write( " $\"2x%5E2%2B-4x%2B-3+=+2%28x-2.58113883008419%29%2A%28x--0.58113883008419%29\"$
\n" ); document.write( " Again, the answer is: 2.58113883008419, -0.58113883008419.\n" ); document.write( "Here's your graph:
\n" ); document.write( " $\"graph%28+500%2C+500%2C+-10%2C+10%2C+-20%2C+20%2C+2%2Ax%5E2%2B-4%2Ax%2B-3+%29\"$

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