document.write( "Question 583406: i cant got the answer to this question 2x^2-15+7. \n" ); document.write( "

Algebra.Com's Answer #372451 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Is the problem to find the roots?
\n" ); document.write( " $\"+2x%5E2-15x+%2B7+=+0+\"$
\n" ); document.write( "Complete the square
\n" ); document.write( " $\"+2x%5E2-15x++=+-7+\"$
\n" ); document.write( " $\"+x%5E2+-+%2815%2F2%29%2Ax+=+-%287%2F2%29+\"$
\n" ); document.write( " $\"+x%5E2+-+%2815%2F2%29%2Ax+%2B+%2815%2F4%29%5E2+=+-%287%2F2%29+%2B+%2815%2F4%29%5E2+\"$
\n" ); document.write( " $\"+%28+x+-+15%2F4+%29%5E2+=+-%2856%2F16%29+%2B+225%2F16+\"$
\n" ); document.write( "

\n" ); document.write( " $\"+x+=+28%2F4+\"$
\n" ); document.write( " $\"+x+=+7+\"$
\n" ); document.write( "and also:
\n" ); document.write( " $\"+x+-+15%2F4+=+-%2813%2F4%29+\"$
\n" ); document.write( " $\"+x+=+2%2F4+\"$
\n" ); document.write( " $\"+x+=+1%2F2+\"$
\n" ); document.write( "Rewrite these as:
\n" ); document.write( " $\"+x+-+7+=+0+\"$
\n" ); document.write( " $\"+x+-+1%2F2+=+0+\"$
\n" ); document.write( " $\"+%28+x+-+7+%29%2A%28+x+-+1%2F2+%29+=+0+\"$
\n" ); document.write( " $\"+%28+x+-+7+%29%2A%28+x+-+1%2F2+%29+=+x%5E2+-+7x+-+%281%2F2%29%2Ax+%2B+7%2F2+\"$ answer
\n" ); document.write( " $\"+x%5E2+-+%2815%2F2%29%2Ax+%2B+7%2F2+=+0+\"$
\n" ); document.write( "Multiply both sides by $\"2\"$
\n" ); document.write( " $\"+2x%5E2+-+15x+%2B+7+=+0+\"$
\n" ); document.write( "So, the factors are correct \n" ); document.write( "

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