Can someone help with geometry?

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

The graph shows the decibel measure for sounds depending on how many times as intense they are as the threshold of sound. noise in a quiet room is 500 times as intense as the threshold of sound. what is the decibel measurement for the quiet room? 20 decibels28 decibels200 decibels280 decibels

(-y to the power of 2 - 4y- to the power of 2 -6 y +3)