6,5(6,9+1,2)+(-0,9)

To solve the expression \(6.5(6.9 + 1.2) + (-0.9)\), follow these steps:

1. Calculate the inside of the parentheses: \[ 6.9 + 1.2 = 8.1 \]

2. Multiply by 6.5: \[ 6.5 \times 8.1 = 52.65 \]

3. Now add \(-0.9\): \[ 52.65 + (-0.9) = 52.65 - 0.9 = 51.75 \]

Thus, the final result is: \[ \boxed{51.75} \]