Perturbed

Sami is perturbed about that.

Yanni is perturbed about Skura's lesbian relationship with Nuja.

I was more than a bit perturbed.

Then, in his perturbed imaginings he began to write poetry, full of frantic allusions to the harangues of Demosthenes and Cicero.

Leonid was visibly perturbed by that.

The equation x² − 3.0001x + 2 = 0 is a perturbed version of x² − 3x + 2 = 0.