The expression 8x2 − 64x + 720 is used to approximate a small town's population in thousands from 1998 to 2018, where x represents the number of years since 1998. Choose the equivalent expression that is most useful for finding the year when the population was at a minimum.
8(x − 4)2 + 592
8(x − 4)2 − 592
8(x2 − 8x + 90)
8(x2 − 8x) + 90
1 answer
8(x − 4)^2 + 592