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Irina-Kira [14]
3 years ago
9

What is the factored form of x^2-x-2? ​

Mathematics
1 answer:
ipn [44]3 years ago
8 0

Answer:

(x+1)(x-2)

Step-by-step explanation:

You can factor this by grouping.

x^2-x-2

\left(x^2+x\right)+\left(-2x-2\right)

x\left(x+1\right)-2\left(x+1\right)

\left(x+1\right)\left(x-2\right)

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Solving Rational Inequalities and use sign diagram to sketch the graph. Image attached for better understanding.
hjlf

Answer:

x ∈ (-∞ , -2) ∪ (1, 3)

Step-by-step explanation:

The expression is already factored. Note that for the polynomial that appears in the numerator (x-3)(x + 2) there are 2 roots:

x = 3\\x = -2

For the polynomial that appears in the denominator there is 1 root:

x = 1

Note that x = 1 does not belong to the domain of f(x) because it zeroes the denominator of the function and the division between zero is not defined.

With these three roots we do the study of signs to find out when f(x)

Observe the attached image

Note that:

(x-3) when x

(x + 2) when x

(x-1) when x

Finally, we have the solution:

x ∈ (-∞ , -2) ∪ (1, 3)

5 0
3 years ago
Help no links please
Ludmilka [50]

Answer:

180

Step-by-step explanation:

The difference between 68 and 23 is 45. The company charging 23$ has to be 45$ more for the amount of hours. When you multiply 180 by .4 you get 72, and when you multiply 180 by .65 you get 117. The difference is 45.

Sorry that I didn't show my work, I don't really know how to do this other than plugging in random numbers and 180 fits so...

Hope this helps!

3 0
3 years ago
Multiply the followong polynomails using a method of choice (2x+5)x2+5x+1)
shepuryov [24]
If you Multiply the equation you will get 9x+11
8 0
3 years ago
What is the value of x in the equation <br><br> 2x=368-4
Dennis_Churaev [7]

Answer: x= 182

Step-by-step explanation:368-4= 364.

Then divide 364 by 2

Answer will be 182

8 0
3 years ago
Can I get some help on this can’t find any of the answers anywhere
In-s [12.5K]

Answer:

3(9)+20=47

Step-by-step explanation:

47 inches after 9 weeks

7 0
2 years ago
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