SOLUTION: The square of a positive number increased by 4 times the number is equal to 140. Find the number.

Question 1009238: The square of a positive number increased by 4 times the number is equal to 140. Find the number.
Found 2 solutions by fractalier, MathLover1:
Answer by fractalier(6550) (Show Source): You can put this solution on YOUR website!
Call the number, x. Then we have
x^2 + 4x = 140
x^2 + 4x - 140 = 0
(x + 14)(x - 10) = 0
x = -14 or x = 10
Thus
x = 10
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!
let a positive number be
if the of a positive number increased by times the number is equal to , we have

solutions:
if =>
if =>
so, the number could be or
but, since given condition is that we need "a positive number", your solution is number

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