If –3 + i is a root of the polynomial function f(x), which of the following must also be a root of f(x)?

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

Which of the following best describes the figure?