Solve x2 + 4x − 4 = 0. x equals the quantity of negative 2 plus or minus square root 16 all over 2 x equals negative 4 plus or minus square root 2 x equals negative 2 plus or minus 2 square root 2 x equals the quantity of 4 plus or minus square root 18 all over 2

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Solve x2 + 4x − 4 = 0. x equals the quantity of negative 2 plus or minus square root 16 all over 2 x equals negative 4 plus or minus square root 2 x equals negative 2 plus or minus 2 square root 2 x equals the quantity of 4 plus or minus square root 18 all over 2

Mathematics
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okay so you have to isolate x do you know how to do that?
not really

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Use the quadratic formula.\[\huge~\rm~x=\frac{ -b \pm \sqrt{b^2-4ac} }{ 2a }\]
yep ^^
im stuck at \[-4 \pm \sqrt{\frac{ 32 }{ 2 }}\]
ôkay welll to start of you have to divide the entire -4+/-srt(32) by 2 not just the 32 in the square root after that you simply simplify
i got c
Which of the following is a solution of x2 + 2x + 8? 4 + i times the square root of 7 −1 + i times the square root of 7 1 + i times the square root of 7 −4 + i times the square root of 7
im stuck on this one i got to \[-2\pm \sqrt{\frac{ 36 }{ 2 }}\]
You add 32 and 4. :D Continue. |dw:1438728318711:dw|
and then that came out to what i put. that's the part that im stuck on CX
4-32 is not 36...
oh its -28

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