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3 years ago

8

Factor the trinomial. x^2-4x-5

1 answer:

Morgarella [4.7K]3 years ago

7 0

<h3>Answer: Choice C. (x+1)(x-5)</h3>

We need to find two numbers that

Multiply to -5 (last term)
Add to -4 (middle coefficient)

Through trial and error, those two numbers are 1 and -5

1 times -5 = -5
1 plus -5 = -4

So this means x^2-4x-5 factors to (x+1)(x-5)

This is the same as (x-5)(x+1) since the order of multiplication doesn't matter.

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2 years ago

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1 year ago

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So the first thing that you would want to do is find what 9 is multiplied by to get 21. To do this, we can just do a simple algebraic equation: 9x=21. The answer is 7/3 because mAgIc. So now, we can also multiply 6 by 7/3. this would be 42/3 because of more MaGiC. 42/3 divides into 14 because im just obviously a mage. lol I hope this helped.

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2 years ago

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AleksandrR [38]

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3 years ago