4 years ago

Tell which number is prime: 18, 42, 68, 79.

Mathematics

2 answers:

fredd [130]4 years ago

8 0

The number is 79 that is prime

nadezda [96]4 years ago

3 0

She is correct the answer is 79.

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Given:

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The value of k and $x_1$ .

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We have,

$x^2+13x+k=0$ ...(i)

Putting $x=-9$ , we get

$(-9)^2+13(-9)+k=0$

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