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x+2/x-2 - x-2/x+2=x-3/x+3 -x+3/x-3
(x+2)²-(x-2)²/x²-4=(x-3)²-(x+3)²/(x²-3)
x²+4+4x-x²-4+4x/x²-4=x²+9+6x-x²-9+6x/x²-9
8x/x²-4=12x/x²-9
12x³-48x=8x³-72x
4x³=-24
x³=-6
x=∛6
(x+2)²-(x-2)²/x²-4=(x-3)²-(x+3)²/(x²-3)
x²+4+4x-x²-4+4x/x²-4=x²+9+6x-x²-9+6x/x²-9
8x/x²-4=12x/x²-9
12x³-48x=8x³-72x
4x³=-24
x³=-6
x=∛6
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