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elixir [45]
2 years ago
14

Which expression is equivalent to x/(x-4)(x-5)+1/(x-5)

Mathematics
1 answer:
lilavasa [31]2 years ago
5 0

Answer:

Evaluate

(x^{3} -10x^{2} + 26x-4  \\ (x-5) (x-4)

Step-by-step explanation:

x/(x−4)(x−5)+1/(x−5)

Express  

x−4

x

​

(x−5) as a single fraction.

x−4

x(x−5)

​

+

x−5

1

​

To add or subtract expressions, expand them to make their denominators the same. Least common multiple of x−4 and x−5 is (x−5)(x−4). Multiply  

x−4

x(x−5)

​

 times  

x−5

x−5

​

. Multiply  

x−5

1

​

 times  

x−4

x−4

​

.

(x−5)(x−4)

x(x−5)(x−5)

​

+

(x−5)(x−4)

x−4

​

Since  

(x−5)(x−4)

x(x−5)(x−5)

​

 and  

(x−5)(x−4)

x−4

​

 have the same denominator, add them by adding their numerators.

(x−5)(x−4)

x(x−5)(x−5)+x−4

​

Do the multiplications in x(x−5)(x−5)+x−4.

(x−5)(x−4)

x

3

−5x

2

−5x

2

+25x+x−4

​

Combine like terms in x

3

−5x

2

−5x

2

+25x+x−4.

(x−5)(x−4)

26x−4−10x

2

+x

3

​

Expand (x−5)(x−4).

x 2−9

x+20

26x−4−10x

2 +x 3

​

​

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