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astraxan [27]
3 years ago
11

The difference of twice a number and 3 is -21

Mathematics
1 answer:
never [62]3 years ago
4 0

Answer:

The answer to the promblem is -7

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3х2 = 147<br> Solve by undoing
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Answer: +/- 7

Step-by-step explanation:

3x² = 147

To solve for x divide through by three first.

3x² = 147

x² = 49, now we take the square root of both side by trying to apply laws of indices.

√x² = √49

The square root will neutralize the effect of the square because

√a = a¹/² so (x²)¹/², and (x²)¹/² =

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