document.write( "Question 1126477: P(x)=-x^2+6x+7
\n" ); document.write( "a. find x and y intercepts\r
\n" ); document.write( "\n" ); document.write( "b. if this function represents the profit a company makes (in thousands of dollars), then find the maximum profit they can make selling x item.
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Algebra.Com's Answer #742790 by josmiceli(19441)\"\" \"About 
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y-intercept:
\n" ); document.write( "\"+P%280%29+=+0%5E2+%2B+6%2A0+%2B+7+\"
\n" ); document.write( "\"+P%280%29+=+7+\"
\n" ); document.write( "x-intercept;
\n" ); document.write( "\"+P%28x%29+=+0+\"
\n" ); document.write( "\"+x%5E2+%2B+6x+%2B+7+=+0+\"
\n" ); document.write( "complete the square
\n" ); document.write( "\"+x%5E2+%2B+6x+%2B+9+=+-7+%2B+9+\"
\n" ); document.write( "\"+%28+x+%2B+3+%29%5E2+=+2+\"
\n" ); document.write( "\"+x+%2B+3+=+sqrt%282%29+\"
\n" ); document.write( "\"+x+=+-3+-+sqrt%282%29+\"
\n" ); document.write( "\"+x+=+-3+%2B+sqrt%282%29+\"
\n" ); document.write( "( there are 2 x-intercepts )\r
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