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Originally Posted by james_bond There are no simple solutions for the first and I haven't checked the second. How are you expected to solve them (eg. Cardano's cubic formula, use technology to get approximate solutions etc.)?
I have to give the explicit answer not just numerical approximation. I can use whatever I know/find not just Cardano's method. Using Mathematica I've found 2 solutions to the first equation: and . Waiting for ideas...
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