SOLUTION: a number x squared is 39 more than the product of 10 and x

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Question 367919: a number x squared is 39 more than the product of 10 and x
Answer by ewatrrr(24785) About Me  (Show Source):
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Hi

Write as we Read***

x^2 = 10x + 39

solving for x

x^2 - 10x  - 39 = 0

factoring

(x -13)(x + 3) = 0

(x -13)= 0

x = 13

(x + 3) = 0

x = -3



checking our answers

169 = 130 + 39 

9 = -30 + 39