There is the answer hope you like it I also added the steps
Answer:

Step-by-step explanation:
Standard form of polynomial 





★ QUADRATIC RESOLUTION ★
Roots of the given equation will be imaginary because it's discriminant is less than 0 and hence it'll yield imaginary solutions
D < 0
b² - 4ac < 0
4² - 4 ( 5 ) < 0
16 - 20 < 0
-4 < 0
Hence it's character is stated above
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Isaiah would have to put 10 one-hundred gram weights to balance it out because there are 1000 grams in a kilogram.