1.

x-3 x+3 48x+3 x-3 7

Answer»

(x-3)/(x+3) - (x+3)/(x-3) = 48/7 (x*x-6x+9-x*x-6x-9)/(x*x-9) = 48/7 -12x/(x*x - 9) = 48/7 -7x = 4x*x - 36 4x*x + 7x - 36 = 0 4x*x + 16x - 9x - 36 = 0 4x(x+4)-9(x+4) = 0 (4x-9)(x+4) = 0 x = -4,9/4



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