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borishaifa [10]
3 years ago
6

The square of a number decreased by 15 is twice the number. find the number

Mathematics
1 answer:
jonny [76]3 years ago
6 0

Answer:

x = 5, -3

Step-by-step explanation:

x² - 15 = 2x

x² - 2x - 15 = 0

(x - 5)(x + 3) = 0

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