How do you solve this question: x = 4x^2 -x +-4?

I am trying to work out what x is in the equation please. THanks
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1 Answer

x=4x²-x+(-4)=4x²-x-4.

So 4x²-2x-4=0 when we subtract x from each side.

Now divide through by 2: 2x²-x-2=0. We can use the quadratic formula to solve for x:

x=(1±√(1+16)/4=(1±√17)/4=1.2808 or -0.7808 approx.

by Top Rated User (1.2m points)

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