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7 votes
7 votes
Given that x^6 = 64, which of the following could be the value of 9x^2 + 3x ?

User Mittal Bhatt
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2.2k points

1 Answer

15 votes
15 votes

Answer:

42,-42

Explanation:

We first solve for x from x^6 = 64, by taking the root of both sides, and we get x = 2,-2

We then plug in both of the x values and get 42,-42

PS: That should be the right answer but you didn't include the possible answers, and I somehow also got 30 when plugging in -2, but just try it yourself to be safe.

User HamedFathi
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3.3k points