document.write( "Question 1052721: If 4 is added to 7 times a positive number, the result is twice the square of the number. Find the number. \n" ); document.write( "
Algebra.Com's Answer #668057 by ewatrrr(24785)![]() ![]() You can put this solution on YOUR website! 7n + 4 = 2n^2 \n" ); document.write( "2n^2 - 7n - 4 = 0 \n" ); document.write( "(2n +1)(n - 4)= 0 \n" ); document.write( "n = 4 (a positive number) \n" ); document.write( "And... \n" ); document.write( "28 + 4 = 2*16 CHECKS! \n" ); document.write( " |