2 years ago

Please help I only have about a few minutes!

1 answer:

Gnoma [55]2 years ago

5 0

Answer:

i want to say the answer is C, i'm sorry if its incorrect, but i'm 50/50 that its C

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murzikaleks [220]

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c=36

Step-by-step explanation:

Because $x^2-c=108$ can be rewritten as $x^2-c-108=0$ , finding the value of c so that x=(+-)12 solves this equation it means to find the value of c so that $(+-)12^2-c-108=0$ .
Because $12^2=(-12)^2=144$ , we must find c so that $144-c-108=0$ .
Because $144-108=36$ , c=36.
To check, replace c=36 in the initial equation, and check it is a solution for x=(+-)12.