document.write( "Question 243543: There are two numbers with the following properties.
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document.write( "1) the second number is 3 more than the first number.
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document.write( "2) the product of the two numbers is 9 more than their sum.
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document.write( "Which of the following represents possible values of these two numbers?
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document.write( "A) -6,-3 B)-4,-1 C)-1,4 D)-3,6
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document.write( "*ALSO CAN YOU PLEASE SHOW ME THE STEPS TO SOLVE THE QUESTION? THANK YOU! \n" );
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Algebra.Com's Answer #178405 by oberobic(2304)![]() ![]() ![]() You can put this solution on YOUR website! A key to simplifying word problems is to use as few unknowns as possible. Usually this means defining two (or more) variables in terms of one unknown. \n" ); document.write( ". \n" ); document.write( "For example, we are told there are two numbers. That suggests x & y. But we also are told that y is 3 more than x, which can be shown as x+3. So we can use this approach here. \n" ); document.write( ". \n" ); document.write( "The product of the two numbers is 9 more than their sum. \n" ); document.write( "x(x+3) = x + (x+3) + 9 \n" ); document.write( ". \n" ); document.write( "Multiplying the left-hand factor, we have \n" ); document.write( "x^2 + 3x = x + (x+3) + 9 \n" ); document.write( "Collecting like terms: \n" ); document.write( "x^2 + 3x = 2x + 12 \n" ); document.write( "Subtracting 2x from both sides: \n" ); document.write( "x^2 + x = 12 \n" ); document.write( "Subtracting 12 from both sides: \n" ); document.write( "x^2 + x - 12 = 0 \n" ); document.write( ". \n" ); document.write( "Now we have to decide if we can factor the quadratic. We see that 3*4 = 12 are separated by just 1. And since the 12 is negative, we use opposite signs: -3 and +4 = 1. \n" ); document.write( ". \n" ); document.write( "(x-3)(x=4) = 0 \n" ); document.write( ". \n" ); document.write( "We have two candidate solutions: x=3 and x=-4. \n" ); document.write( ". \n" ); document.write( "Testing x=3. \n" ); document.write( "The consecutive terms would be 3 and 6. \n" ); document.write( "The second number is now 3 more than the first \n" ); document.write( "The product is 3*6 = 18. \n" ); document.write( "The sum is 3+6=9, which is 9 less than 18. \n" ); document.write( "So that checks. \n" ); document.write( ". \n" ); document.write( "Testing x = -4. \n" ); document.write( "The terms would be -4 and -1. \n" ); document.write( "The product = -4 * -1 = 4. \n" ); document.write( "The sum = -4 + -1 = -5. \n" ); document.write( "Are they 9 apart? Yes. \n" ); document.write( "So that checks, too. \n" ); document.write( ". \n" ); document.write( "That means the values are: \n" ); document.write( "-4, -1 \n" ); document.write( "and \n" ); document.write( "3, 6 \n" ); document.write( ". \n" ); document.write( " |