## College Algebra 7th Edition

Union means combining the elements of the sets involved. The interval $(-2, 0)$ contains the real numbers between $-2$ and $0$ (but not -2 and 0 themselves). The interval $(-1, 1)$ contains the real numbers between $-1$ and $1$ (but not including -1 and 1 themselves). Combining these two sets will include all real numbers between $-2$ and $1$, but not including $-2, -1, 0,$ and $1$. To graph this, plot holes at $-2, -1, 0,$ and $1$. Then shade the regions in between them. (refer to the attached image in the answer part above)