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Black_prince [1.1K]
4 years ago
15

Use the remainder theorem to factor

Mathematics
2 answers:
lana [24]4 years ago
7 0

Answer:

A is the correct choice

Step-by-step explanation:

Use synthetic division to check:

x^3-3x^2-13x+15 / x-5

5 | 1 -3 -13 15

       5  10 -15

_________

    1  2 -3 0

This means x^2+2x-3 with no remainder which means A works

dimaraw [331]4 years ago
4 0

Answer:

A) (x2 + 2x - 3)(x - 5)

Step-by-step explanation:

x³ - 3x² - 13x + 15

x = 5

5³ - 3(5)² - 13(5) + 15 = 0

So 5 is a root and x-5 is a factor

Since the constant is 15, it has to be

A) (x2 + 2x - 3)(x - 5)

(-5) × (-3) = 15

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