Quote:
(7x-2)^1/3 + (7x+5)^1/3 = 3
=> [(7^1/3)^3)(x^1/3)^3 - (2^1/3)^3)] + [(7^1/3)^3(x^1/3)^3 + (5^1/3)^3) = 3^3
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I'm not sure you're allowed to break up a power like that. Because like...if you have:
(x-2)^2
=> x^2 -4x + 4
It's kinda hard to relate because of the way we haveta type it out, but I don't see that form there...
Plus, the OP said the answer was 3/7