kimberly198116 kimberly198116

23-01-2022
Mathematics

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7 and -3 are the roots of the quadratic equation x^2+kx-21=0 what is the value of k

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jen4755 jen4755

23-01-2022

Answer:

-4

Step-by-step explanation:

The roots are 7 and -3, so the factored version is (x - 7) (x + 3)

Foil them and you get x^2 - 4x - 21

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