how to set 2x^{2}-4x-1 eqaul to 0? do you have to factor it first or does it matter?
Follow Math Help Forum on Facebook and Google+
Originally Posted by pnfuller how to set 2x^{2}-4x-1 eqaul to 0? do you have to factor it first or does it matter? is not a perfect square, so the expression will not factor over the rationals ... you'll have to complete the square or use the quadratic formula.
do i need the whole quadratic formula or the just b^2-4ac part you mentioned? Originally Posted by skeeter is not a perfect square, so the expression will not factor over the rationals ... you'll have to complete the square or use the quadratic formula.
is part of the quadratic formula ... and yes, you need the whole formula to solve for x.
would the answers be 2.225 and -.225
Originally Posted by pnfuller would the answers be 2.225 and -.225 In fact they are. But all things considered I would suspect your instructor would prefer -Dan
View Tag Cloud