2,8•4,5+5,8

To solve the expression \(2.8 \times 4.5 + 5.8\), follow these steps:

1. Calculate \(2.8 \times 4.5\): \[ 2.8 \times 4.5 = 12.6 \]

2. Then add \(5.8\) to the result: \[ 12.6 + 5.8 = 18.4 \]

So, the final result is \(18.4\).