-1,7•0,4+(-1,6)•(-4,2)

To solve the expression \(-1.7 \cdot 0.4 + (-1.6) \cdot (-4.2)\), we will calculate each part step by step.

1. Calculate \(-1.7 \cdot 0.4\): \[ -1.7 \cdot 0.4 = -0.68 \]

2. Calculate \((-1.6) \cdot (-4.2)\): \[ (-1.6) \cdot (-4.2) = 6.72 \]

3. Now, add the results from the two calculations: \[ -0.68 + 6.72 = 6.04 \]

So, the final result of the expression \(-1.7 \cdot 0.4 + (-1.6) \cdot (-4.2)\) is \(6.04\).