document.write( "Question 551010: The sum of the two roots of a quadratic equation is 5 and their product is -6. What could be the equation? \n" ); document.write( "
Algebra.Com's Answer #359328 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! The sum of the two roots of a quadratic equation is 5 and their product is -6. What could be the equation? \n" ); document.write( ": \n" ); document.write( "let the two roots be a and b \n" ); document.write( "a + b = 5 \n" ); document.write( "b = (5-a) \n" ); document.write( "and \n" ); document.write( "ab = -6 \n" ); document.write( "so we have \n" ); document.write( "a(5-a) = -6 \n" ); document.write( "5a - a^2 = -6 \n" ); document.write( "0 = a^2 - 5a - 6 could be the equation \n" ); document.write( "Factors to \n" ); document.write( "(a-6)(a+1)= 0 \n" ); document.write( "two solutions \n" ); document.write( "a=6, then b=-1 \n" ); document.write( "a=-1 then b=6 \n" ); document.write( " \n" ); document.write( " |