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3 years ago

What is the factored form of x2 – X–2?

Mathematics

2 answers:

Andreas93 [3]3 years ago

6 0

Answer:

Step-by-step explanation:

kotykmax [81]3 years ago

4 0

Answer:

${x}^{2} - x - 2 \\ {x}^{2} - 2x + 1 x- 2 \\ {x}^{2} + 1x - 2 x- 2 \\ x(x + 1) - 2(x + 1) \\ = (x + 1)(x - 2)$

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Find the term indecent of x in the expansion of (x^2-1/x)^6

Mars2501 [29]

By the binomial theorem,

$\displaystyle \left(x^2-\frac1x\right)^6 = \sum_{k=0}^6 \binom 6k (x^2)^{6-k} \left(-\frac1x\right)^k = \sum_{k=0}^6 \binom 6k (-1)^k x^{12-3k}$

I assume you meant to say "independent", not "indecent", meaning we're looking for the constant term in the expansion. This happens for k such that

12 - 3k = 0 ===> 3k = 12 ===> k = 4

which corresponds to the constant coefficient

$\dbinom 64 (-1)^4 = \dfrac{6!}{4!(6-4)!} = \boxed{15}$

3 0

2 years ago

Look at this expression.

Soloha48 [4]

Answer:

c 18

Step-by-step explanation:

Idid thsi in Kahn academy and got it correctly

4 0

2 years ago

If m=8, how many solutions are there for the expression m-8?

ss7ja [257]

Answer:

1 solution, 0

Step-by-step explanation:

In algebra, a variable can be equal to any amount of numbers depending on how it is used. In this case, m is only equal to the one value of 8, and therefore only has <u>one solution.</u>

m - 8

(8) - 8

5 0

3 years ago

I don’t understand lol

pogonyaev

Answer:

3*r = 3

Step-by-step explanation:

$\dfrac{24}{r}=3\\\\24 = r*3\\\\\dfrac{24}{3}=r\\\\6 = r$ 6 is a solution.

$3*r=3\\\r =\dfrac{3}{3}\\\\r = 1\\$

6 is not a solution.

$7r = 42\\\\r =\dfrac{42}{7}\\\\r = 6$

6 is a solution

8 0

2 years ago

Read 2 more answers

147 plus what equals 180

olga55 [171]

In order to find this out, we just flip this equation to find the inverse solution.

180-147=?

33.

3 0

3 years ago

Read 2 more answers