SOLUTION: Find the number which,when added to its square,makes 90?

SOLUTION: Find the number which,when added to its square,makes 90?

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Question 810695: Find the number which,when added to its square,makes 90?
Answer by fcabanski(1391) (Show Source): You can put this solution on YOUR website!

(x+10)(x-9) = 0

x = -10 or 9

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