SOLUTION: solve. r^2-6r-16=0

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Question 380643: solve.
r^2-6r-16=0
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi,

solving

r^2-6r-16 = 0

factoring

(r-8)(r+2) = 0 Note:SUM of the inner product(-8r) and the outer product(2r) = -6r

(r-8)(r+2) = 0

(r-8)= 0 

  r = 8

(r+2) = 0

  r = -2