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.