Question 162269: I need to complete the square:
2d^2=8+10d
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! I need to complete the square:
2d^2=8+10d
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2d^2 - 10d - 8 = 0
d^2 - 5d - 4 = 0
The c term has to be (b/2)^2, or (-5/2)^2 = 25/4
So it's necessary to add 4+25/4 to both sides
d^2 - 5d + 25/4 = 41/4
Then take the sqrt
d - 5/2 = sqrt(41)/2 and -sqrt(41)/2
Add the 5/2
d = (5+sqrt(41))/2 and d = (5-sqrt(41))/2
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