SOLUTION: How do you solve z^2-5z-6=0 using the quadratic formula?

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Question 429134: How do you solve z^2-5z-6=0 using the quadratic formula?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

z^2-5z-6=0    |Note the use of ^ (uppercase 6)

z+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+   az^2 + bz + c = 0

z+=+%285+%2B-+sqrt%28+49+%29%29%2F%282%29+

   z+=+%285+%2B-+7%29%2F%282%29+

     z = 12/2 = 6  OR z =-2/2 = -1



CHECKING our Answer(s)***

  36-32-6 = 0        when z = 6

  1 -5*-1 - 6 = 0    when z = -1