document.write( "Question 188383:  Find all zeros of the polynomial equation
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document.write( "x3-2x2+10x+136=0
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Algebra.Com's Answer #141236 by stanbon(75887)    ![]() You can put this solution on YOUR website! Find all zeros of the polynomial equation \n" ); document.write( "x^3-2x^2+10x+136=0 \n" ); document.write( "---------- \n" ); document.write( "I graphed it and found x=-4 is a zero. \n" ); document.write( "Use synthetic division to find the other zeroes. \n" ); document.write( "---------- \n" ); document.write( "-4)....1....-2....10....136 \n" ); document.write( ".........1....-6....34...|..0\r \n" ); document.write( "\n" ); document.write( "Quotient: x^2 - 6x + 34 \n" ); document.write( "Use the quadratic formula to find remaining zeroes. \n" ); document.write( "x = [6 +- sqrt(36 -4*1*34)]/2 \n" ); document.write( "x = [6 +- sqrt(-100)]/2 \n" ); document.write( "x = [6 +- 10i]/2 \n" ); document.write( "====================== \n" ); document.write( "Zeroes are x = -4, x = (3+5i), x = (3-5i) \n" ); document.write( "========================================= \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( "  |