What two numbers, if added together, would equal -15 but when multiplied together would equal -42

1 answer:

3 0

Consider factors of 42, then if the factors can be added or subtracted.

42 = 42 * 1
42 = 21 * 2
42 = 14 * 3
42 = 7 * 6

Since none of these can be added or subtracted to equal 15, no intergers satisfy these criteria.

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Normal probability distribution

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$Z = \frac{X - \mu}{\sigma}$

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