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If a , b ,c real in G.P., then the roots...

If `a , b ,c` real in G.P., then the roots of the equation `a x^2+b x+c=0` are in the ratio a. `1/2(-1+isqrt(3))` b. `1/2(1-isqrt(3))` `c 1/2(-1-isqrt(3))` d. `1/2(1+isqrt(3))`

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