Factor completely- 10u^6+26u^5-12u^4

-10u^6 + 26u^5 - 12u^4

first we find the GCF of -10,26, and -12thats gonna be a -2

now for the variablestake the smallest exponent...thats gonna be u^4

so we factor out -2u^4

-10u^6 + 26u^5 - 12u^4
-2u^4(5u^2 - 13u + 6)...it can factor further
-2u^4(u - 2)(5u - 3) <==

The answer is 225 miles per 4.5 hours. hope this ; )