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ladiesman217
 one year ago
Best ResponseYou've already chosen the best response.0solve \[2x ^{2}8x=7\]

.Sam.
 one year ago
Best ResponseYou've already chosen the best response.0Apply http://openstudy.com/users/.sam.#/updates/5181023ce4b0aaab28b79617

Shadowys
 one year ago
Best ResponseYou've already chosen the best response.1add 7 to both sides. \(2x^2  8x +7=0\) then apply the general formula.

ladiesman217
 one year ago
Best ResponseYou've already chosen the best response.0\[\frac{ (8)\sqrt{8x ^{2}2x*7} }{ 2*2 }\]

Shadowys
 one year ago
Best ResponseYou've already chosen the best response.1it's \(x=\frac{(8)\pm \sqrt{(8)^24(2)(7)}}{2(2)}\) though

ladiesman217
 one year ago
Best ResponseYou've already chosen the best response.0ok so simplify all that its \[\frac{ 8\sqrt{6414} }{ 4 }\]

Shadowys
 one year ago
Best ResponseYou've already chosen the best response.1u forgot to multiply the 14 by 4? the others are right

ladiesman217
 one year ago
Best ResponseYou've already chosen the best response.0so \[\frac{ 8\sqrt{6456} }{ 4 }\]

Shadowys
 one year ago
Best ResponseYou've already chosen the best response.1yup! you've got it. :)

ladiesman217
 one year ago
Best ResponseYou've already chosen the best response.0so simplify that its \[\frac{ 2\sqrt{2} }{ 2 }\]

Shadowys
 one year ago
Best ResponseYou've already chosen the best response.1wait. you've missed the plus minus out. \(\frac{8 \pm \sqrt{8}}{4}\)=\(\frac{8 \pm 2\sqrt{2}}{4}=\frac{4 \pm \sqrt{2}}{2}\)
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