SOLUTION: what are the two roots for the equation -x^2+8x-7=0

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Question 729964: what are the two roots for the equation -x^2+8x-7=0
Answer by hoomanc(14) About Me  (Show Source):
You can put this solution on YOUR website!
for all such problems that match with following pattern just follow the procedure and that will easily solve!
pattern: ax%5E2%2Bbx%2Bc
step 1) determine each value from your equation:
in this case
a=-1 b=8 c=-7
step 2) calculate value D as D=+b%5E2-4ac
in this case
so you would have answer follow to next step to find out.
step4) the answer of this equation would be as follow:
(1) %28-b%2Bsqrt%28D%29%29%2F%282a%29 in this case %28-8%2Bsqrt%2836%29%29%2F%282%29=-1
(2) %28-b-sqrt%28D%29%29%2F%282a%29 In this case%28-8-sqrt%2836%29%29%2F%282%29=-7
it is obvious that if the value of "D" get equal to zero two answer would be the same as %28-b%2F2a%29

Good Luck