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Simplify(5x-6.9) (2x + 12.2)O10x84.18O 10x² +47.2x-84.187x² + 74.8x + 5.37x² + 5.3

User Techmaster
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1 Answer

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25 votes

QUESION: Simplify (5x-6.9)(2x + 12.2)

Step-by-step explanation:

(5x - 6.9)(2x + 12.2)

Let's open the bracket by multiplying:

10x² + 61x - 13.8x - 82.18

Let's collect like terms but adding and subtracting each variable according to its power:

10x² + 47.2x - 82.18

Therefore, the simplified form of (5x-6.9)(2x + 12.2) is 10x² + 47.2x - 82.18.

So, the correct option is the second option which is 10x² + 47.2x - 82.18.

User El Mac
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