Answer:
13
Step-by-step explanation:
(4,-5)(-1,7)
If you make a triangle and use the Pythagorean Theorem, the two legs have a distance of 5 and 12. 5^{2}+12{2}=25+144=169. The square root of 169 is 13.
Sub x=3 into ((x^2)-x)^2 - (x^2 - x) = 30. So the answer is A.
The answer is either 10:16 or 5:8
