SOLUTION: z^2 + 12z + 15 = 0 I tried in the Quadractic having trouble solving it.

Question 298458: z^2 + 12z + 15 = 0
I tried in the Quadractic having trouble solving it.
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
z^2 + 12z + 15 = 0

z=(-12+-sqrt[12^2-4*1*15])/2
z=(-12+-sqrt144-60])/2
z=(-12+-sqrt84)/2
z=(-12+-9.165)/2
z=(-12+9.165)/2
z=-2.835/2
z=-1.4175 ans.
z=(-12-9.165)/2
z=(-21.165)/2
z=-10.5825 ans.

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