- A question about complex number: to solve equation (z+1)^4+4(z-1)^4=0?

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How do you solve the x-value of f(x)=-x^2 +2x+3 by Quadratic function? *emergency* $5000 is divided amoung A, B, C so that A has twice as much as B, and B has quarter as much as C.
a). Find A:B:C.? How many g of ethanol should made from 60 g of glucose? Determine the intervals on which the function is increasing, decreasing, and constant.? What is the answer for -(49)^1/2? Thanks :)?