Answer:
-3.8
Step-by-step explanation:
-3.8+7.2=3.4
Remember that squaring something is just multiplying that number by itself.





X^2 - 5x - 14 = 0
what multiplies to negative 14 and adds to negative 5? -7 and positive 2.
(x - 7) (x + 2) = 0
Lesser x = -2
Greater x = 7
4hrs, I think, because 20 divided by 5 is 4.