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starfox5454
11.11.2020 •
Mathematics
How do you factor f(x) = x^3 – 3x^2 – 10x + 24 ?
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Ответ:
Step-by-step explanation:
I would use the Horner method.
f(x) = x³ – 3x² – 10x + 24
f(2) = 2³ - 3·2² - 10·2 +24 = 0 ⇒ x=2 is the root of function
So:
| 1 | -3 | -10 | 24 |
2 | 1 | -1 | -12 | 0 |
therefore:
f(x) = x³ – 3x² – 10x + 24 = (x – 2)(x² – x – 12)
For x² – x – 12:
It means:
f(x) = x³ – 3x² – 10x + 24 = (x – 2)(x – 4)(x + 3)
Ответ:
Goats: 32
Cows: 24
Animals: 56
Step-by-step explanation:
Using a proportion, equivalent ratios, you can use the number of goats to find the total number of animals and then the number of cows:
Cross-multiply: 4x = (32)(7) or 4x = 224
Divide: 4x/4 = 224/4 or x = 56
Total number of animals = 56
Number of goats: 32
Number of cows: 56 - 32 = 24