document.write( "Question 1167984: 1. The square of a positive integer is 98 less than twice the square of the next consecutive integer. Find the integers. Show your solution.\r
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document.write( "2. Find two integers differ by 4, while their squares differ by 56. Show your solution. \n" );
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Algebra.Com's Answer #792590 by VFBundy(438)![]() ![]() You can put this solution on YOUR website! 1. The square of a positive integer is 98 less than twice the square of the next consecutive integer. Find the integers. \n" ); document.write( " \n" ); document.write( "First integer = x \n" ); document.write( "Second integer = x + 1 \n" ); document.write( " \n" ); document.write( "x² = 2(x + 1)² - 98 \n" ); document.write( " \n" ); document.write( "x² = 2(x² + 2x + 1) - 98 \n" ); document.write( " \n" ); document.write( "x² = 2x² + 4x + 2 - 98 \n" ); document.write( " \n" ); document.write( "x² = 2x² + 4x - 96 \n" ); document.write( " \n" ); document.write( "x² + 4x - 96 = 0 \n" ); document.write( " \n" ); document.write( "(x - 8)(x + 12) = 0 \n" ); document.write( " \n" ); document.write( "x = 8 and x = -12 \n" ); document.write( " \n" ); document.write( "Since the problem stated the integers were positive, we can eliminate the x = -12 result. We are left with x = 8. So... \n" ); document.write( " \n" ); document.write( "First integer = x = 8 \n" ); document.write( "Second integer = x + 1 = 9 \n" ); document.write( " \n" ); document.write( "================================================================== \n" ); document.write( " \n" ); document.write( "2. Find two integers differ by 4, while their squares differ by 56. \n" ); document.write( " \n" ); document.write( "First integer = x \n" ); document.write( "Second integer = x + 4 \n" ); document.write( " \n" ); document.write( "(x + 4)² - x² = 56 \n" ); document.write( " \n" ); document.write( "x² + 8x + 16 - x² = 56 \n" ); document.write( " \n" ); document.write( "8x + 16 = 56 \n" ); document.write( " \n" ); document.write( "8x = 40 \n" ); document.write( " \n" ); document.write( "x = 5 \n" ); document.write( " \n" ); document.write( "First integer = x = 5 \n" ); document.write( "Second integer = x + 4 = 9 |