Hcalhoun21
04.05.2021 •
Mathematics
The volume of the cereal box is 270 cubic inches. What is the width of the cereal box?
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Ответ:
b = 40
Step-by-step explanation:
If x = - 20 is a zero of f(x) then f(- 20) = 0 , that is
(- 20)² - 20b + 400 = 0
400 - 20b + 400 = 0
800 - 20b = 0 ( subtract 800 from both sides )
- 20b = - 800 ( divide both sides by - 20 )
b = 40