Question

if x=3√p+q +3√p-q and p²-q²=r² prove that x³-3rx-2p=0

Answer 1

So 3^2-2*3*k-6=0
=>9-6*k-6=0
=>9-6-6k=0
=>3-6k=0
=>-6k=0-3
=>k=-3/-6
=>k=1/2(answer) 
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