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January 25, 2015

January 25, 2015

Posted by **Mary** on Sunday, May 1, 2011 at 4:59pm.

-2x^2-4x+5=0

is the answer -2.22, 0.22

- algebra -
**Reiny**, Sunday, May 1, 2011 at 6:13pmI 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 6:35pmThank you so much could you look at my other problem

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