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inessss [21]
3 years ago
6

If x=-7 is a root of the equation x^2+kx+49=0, then k=​

Mathematics
1 answer:
aleksley [76]3 years ago
8 0

Answer:

k=14

Step-by-step explanation:

Given:

x^{2}+kx+49 = 0

x = -7

Substitution can be used to find the value of k:

(-7)^{2}+(-7)k+49 = 0

49-7k+49 = 0

98 -7k = 0

k = 14

Hope this helps :)

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