Please help a girl out :)
2 answers:
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Answer:
see explanation
Step-by-step explanation:
(a)
x² - 2x - 4
using the method of completing the square
add/subtract ( half the coefficient of the x- term )² to x² - 2x
= x² + 2(- 1)x + 1 - 1 - 4
= (x - 1)² - 5
with c = - 1 and d = - 5
(b)
x² - 2x - 4 = 0 ← using result from (a) , that is
(x - 1)² - 5 = 0 ( add 5 to both sides )
(x - 1)² = 5 ( take the square root of both sides )
x - 1 = ± ( add 1 to both sides )
x = 1 ±
Step 1: Assign variable for the unknown that we need to find.
Let x be the number of 350 ml bottles that you should bring from the supply room.
Step 2: Use the statement given to write a mathematical equation.
Given: 30 liter drum of fertilizer
Convert the liters to milliliters
"The owner of the plant nursery where you work tells you to fill 350 milliliter bottles from a 30 liter drum of fertilizer" means we need to find how many 350 ml are there in 30,000 ml.
Step 3: Simplify and round up to the next whole number.
Conclusion:
<u>Eighty Six </u>bottles with a capacity of 350 milliliter you should bring from the supply room to fill from a 30 liter drum of fertilizer!