Posted by Mary on Sunday, May 1, 2011 at 4:59pm.
solve for x
2x^24x+5=0
is the answer 2.22, 0.22

algebra  Reiny, Sunday, May 1, 2011 at 6:13pm
I have no idea how you got your answers.
Didn't you test them by substituting them back into the equation ?
2x^2  4x + 5 = 0
2x^2 + 4x  5 = 0
x = (4 ± √56)/4 = .8708 or 2.8708

algebra  Mary, Sunday, May 1, 2011 at 6:35pm
Thank you so much could you look at my other problem
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