solve the following:x⅔+x⅓=2
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PUT X = y^3
y^(3×2/3) + y^(3×1/3) = 2
y^2 + y-2 = 0
apply middle term splliting
(y-1) (y+2) = 0
y = 1 and y = -2
x = 1 and x = (-2)^3 = -2√2
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