3 years ago

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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