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2 years ago

Find all roots: x^3-7x^2-12x = 0

Mathematics

1 answer:

Pepsi [2]2 years ago

5 0

Answer:

The roots are 0, 3 and 4.

Step-by-step explanation:

x^3-7x^2-12x = 0 Take out x:

x(x^2 - 7x - 12) = 0 Factor the expression in the brackets:

x(x - 3)(x - 4) = 0

x = 0 or x - 3 = 0 or x - 4 = 0, so

The roots are 0, 3 and 4.

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21 = − 6 x − 3 x + 4 + 4 x

horsena [70]

Answer:

x=-17/5

Step-by-step explanation:

1. Simplify -6x-3x+4+4x−6x−3x+4+4x to -5x+4−5x+4.

21=−5x+4

2. Subtract 44 from both sides.

21−4=−5x

3. Simplify 21-4 to 17.

17=-5x

4. Divided both sides by -5.

-17/5=x

5. Switch sides.

x=-17/5

Hope this helps.

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3 years ago

Describe how you think you can use U.S. traditional multiplication to multiply a 1 digit number by any size number .

egoroff_w [7]

Well for example 4x1=4 hope this helps

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2 years ago

Answer YES if is a Right Triangle or NO if is not

Vilka [71]

Answer:

Part A: yes

Part B: yes

Part C: yes

Step-by-step explanation:

Part A:

77² + 420² = 427²

5,929 + 176,400 = 182,329

182,329 = 182,329

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Part B:

279² + 440² = 521²

77,841 + 193,600 = 271,441

271,441 = 271,441

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Part C:

39² + 760² = 761²

1,521 + 577,600 = 579,121

579121 = 579,121

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7 0

2 years ago

Sandy had five seashells she gave mageret 3 of them how many are left?

erma4kov [3.2K]

Total shells Sandy had = 5
Shells Mageret got = 3
Balance of Seashells
5 - 3
2

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3 years ago

Marylou buys a package of 500 jewels to decorate 4 different pairs of jeans. She uses the same number of jewels on each pair of

patriot [66]

500 divided by 4 = 125 so
125 jewels on each pair of jeans

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3 years ago