document.write( "Question 697554: the length of one leg of a right triangle is 17cm more than that of the other leg. The length of the hypotenue is 4 vm more than triple that of the shorter leg. Find the lenghts of each of the three sides \n" ); document.write( "
Algebra.Com's Answer #430125 by jsmallt9(3758)![]() ![]() ![]() You can put this solution on YOUR website! Let x = the shorter leg. Then the longer leg would be (x + 17) and the hypotenuse would be (3x + 4). In order for this to be a right triangle these sides must fit the Pythagorean equation: \n" ); document.write( " \n" ); document.write( "Now we solve for x. First we simplify. (Be sure to use FOIL or the \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "Since this is a quadratic equation we want one side to be zero. Subtracting the entire left side from each side we get: \n" ); document.write( " \n" ); document.write( "This will factor, but not easily. So you may prefer to use the Quadratic Formula instead. \n" ); document.write( " \n" ); document.write( "From the Zero Product Property: \n" ); document.write( "7x + 39 = 0 or x - 7 = 0 \n" ); document.write( "Solving these we get: \n" ); document.write( "x = -39/7 or x = 7 \n" ); document.write( "We will reject the first solution not because it is a fraction but because it is negative. x is the length of the shorter leg and we cannot have negative lengths. \n" ); document.write( "So the shorter leg is 7 cm. \n" ); document.write( "The longer leg would be x + 17 = 7 + 17 = 24 cm \n" ); document.write( "And the hypotenuse would be 3x + 4 = 3(7) + 4 = 21 + 4 = 25 cm \n" ); document.write( " |