(x-3)(x+3)/(x-4)(x+4)=1/2
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(x-3)(x+3)/(x-4)(x+4)=1/2
by property (a+b)(a-b) = a² - b²
x²-3² 1
--------- = ------
x²-4² 2
(x²-3²)2 = (x²-4²)1
2x²+18 = x² +16
2x²-x² = 16-18
x² = -2
X = -√2
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