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zavuch27 [327]
3 years ago
7

If a + 2b + 6c = -9 what is 12c + 2a + 4b

Mathematics
1 answer:
katrin [286]3 years ago
3 0

Answer:

-18

Step-by-step explanation:

Multiply the given equation by 2.

2(a +2b +6c) = 2(-9)

12c +2a +4b = -18

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Multiply (x2 + 3x + 4)(3x2 - 2x + 1).​
sergij07 [2.7K]

Answer:

The answer is

<h2>3x⁴ + 7x³ + 7x² - 5x + 4</h2>

Step-by-step explanation:

(x² + 3x + 4)(3x² - 2x + 1)

Expand the terms

We have

3x⁴ - 2x³ + x² + 9x³ - 6x² + 3x + 12x² - 8x + 4

Group like terms

That's

3x⁴ - 2x³ + 9x³ + x² - 6x² + 12x² + 3x - 8x + 4

Simplify

We have the final answer as

<h3>3x⁴ + 7x³ + 7x² - 5x + 4</h3>

Hope this helps you

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