How do I find the roots of 4x^3+x+5 = 0? It doesn't appear to be in a nice form like many equations in the textbook?
No problem, don't worry bout it, your a new member so we won't send you to the gallows just yet :tongue: . Seriously though, any help that you can give in the forums is very much appreciated. Welcome to the Forums!Sorry, and on the downside, apparently I can't add :(
When it actually simplifies to;That simplifies to 4(+/-)/[square root of 8]i/8
This answer is actually correct, I missed the minus sign in my previous post (typo sorry ), you must have made a mistake in your previous method. As an aside completing the square is equivalent to using the quadratic equation (in fact the quadratic equation is derived by completing the square)Oopd.. Forgot to take the square root after de squaring 64 :D
Is there any way to simplify 4x^2 + 4x + 5 besides quadratic formula?
I tried completing the square..
4x^2 + 4x + 5..
4(x^2 + x)=-5
(x^2 + x)=-5/4
(x^2 + x + 0.25)=-1
I got real close.. then got that -0.5 at the end..