document.write( "Question 827228: Find the constant of integration, C if y=∫(9x^2+2x-9 )dx and the curve passes through the point (3,8) \n" ); document.write( "
Algebra.Com's Answer #498527 by Edwin McCravy(20054)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "  \"y=int%28%289x%5E2%2B2x-9%29%2Cdx%29\"\"%22%22=%22%22\"\"int%28%289x%5E2%29%2Cdx%29%2Bint%28%282x%29%2Cdx%29%2Bint%28%28-9%29%2Cdx%29\"\"%22%22=%22%22\"\"9int%28%28x%5E2%29%2Cdx%29%2B2int%28%28x%29%2Cdx%29-9int%28dx%29\"\"%22%22=%22%22\"\r\n" );
document.write( "\"9%28x%5E3%2F3%29%2B2%28x%5E2%2F2%29-9x%2BC\"\"%22%22=%22%22\"\"3x%5E3%2Bx%5E2-9x%2BC\"\r\n" );
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document.write( "  y = 3x³+x²-9x+C\r\n" );
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document.write( "Substitute (x,y) = (3,8)\r\n" );
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document.write( "  8 = 3(3)³+(3)²-9(3)+C\r\n" );
document.write( "  8 = 3(27)+9-27+C\r\n" );
document.write( "  8 = 81+9-27+C\r\n" );
document.write( "  8 = 63+C\r\n" );
document.write( "-55 = C\r\n" );
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document.write( "Edwin
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