The two numbers are 8 and 12.
When added, you get a sum of 20.
When multiplied, you get a product of 96.
You would see how many times 6 goes into 30. Which is 5. so you would take 2.5 multiplied by 5. which equals 11 hours
It can be factored.
We need two numbers that multiply to -12 and add to -4, so are two terms would be -6 and 2.
(x - 6) (x + 2) = 0
x = 6
x = -2
Attached solution with detailed work.
20 × 10fl ounces = 200 fl ounces
1 gallon= 128 fl ounces
200 fluid ounces equals about 1.56 gallons so
you would need to buy about two gallon bottles.