document.write( "Question 548889: There are two numbers. the second number is 3 more than the first.the prouduct of the two numbers ia 9 more than teir sum. What are the two numbers?
\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #357294 by Maths68(1474) You can put this solution on YOUR website! Let y and x be the first and second numbers\r \n" ); document.write( "\n" ); document.write( "The second number is 3 more than the first \n" ); document.write( "x=y+3..........(1) \n" ); document.write( "The product of the two numbers is 9 more than their sum \n" ); document.write( "xy=(x+y)+9......(2) \n" ); document.write( "Put the value of x from (1) to (2) \n" ); document.write( "(y+3)y=(y+3)+y)+9 \n" ); document.write( "y^2+3y=y+3+y+9 \n" ); document.write( "y^2+3y=2y+12 \n" ); document.write( "y^2+3y-2y-12=0 \n" ); document.write( "y^2+y-12=0 \n" ); document.write( "y^2+4y-3y-12=0 \n" ); document.write( "y^2+4y-3y-12=0 \n" ); document.write( "y(y+4)-3(y-4)=0 \n" ); document.write( "(y+4)(y-3)=0 \n" ); document.write( "y+4=0 or y-3=0 \n" ); document.write( "y=-4 or y=3 \n" ); document.write( "Put y=3 in (1) \n" ); document.write( "x=y+3..........(1) \n" ); document.write( "y=3 \n" ); document.write( "x=3+3 \n" ); document.write( "x=6 \n" ); document.write( "Put y=-4 in (1) \n" ); document.write( "x=(-4)+3 \n" ); document.write( "x=-4+3 \n" ); document.write( "x=-1\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "x,y=6,3 or x,y=-1,-4\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Check \n" ); document.write( "===== \n" ); document.write( "Put x,y=(6,3) in (1) \n" ); document.write( "x=y+3..........(1) \n" ); document.write( "6=3+3 \n" ); document.write( "6=6 \n" ); document.write( "Put x,y=(6,3) in (2) \n" ); document.write( "xy=(x+y)+9......(2) \n" ); document.write( "(6)(3)=(6+3)+9 \n" ); document.write( "18=9+9 \n" ); document.write( "18=18\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Put x,y=(-1,-4) in (1) \n" ); document.write( "x=y+3..........(1) \n" ); document.write( "-1=-4+3..........(1) \n" ); document.write( "-1=-1 \n" ); document.write( "Put x,y=(-1,-4) in (2) \n" ); document.write( "xy=(x+y)+9......(2) \n" ); document.write( "(-1)(-4)=(-1-4)+9 \n" ); document.write( "4=-5+9 \n" ); document.write( "4=4\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Numbers are = 3,6 or -4,-1\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |