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Umnica [9.8K]
3 years ago
14

Fine the product mentally. [(x+1) (x-1)^2

Mathematics
2 answers:
Murljashka [212]3 years ago
5 0
If the product is: [(x+1) (x-1)]^2 , the answer is:
[(x+1) (x-1)]^2 = [x^2-1]^2 = x^4-2x^2+1
Helga [31]3 years ago
5 0

Answer:

x^4 - 2x^2 +1

Step-by-step explanation:

[(x+1) (x-1)]^2

We notice that this is the difference of squares

a^2 -b^2 = (a+b) (a-b)

Since we have (x+1) (x-1) , it simplifies to (x^2 -1)

[x^2-1]^2

We know  (a-b)^2  is a^2 -2ab +b^2

[x^2-1]^2 = x^4 - 2x^2 +1

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A function follows the rule y = -75 - 5 x . When the function's output is 25, the equation is 25 = -75 - 5 x .
Alex787 [66]

Answer:

The function's input = x = -20

Step-by-step explanation:

Given the function

y = -75 - 5x

Given that the output = y = 25

substituting the value y=25 and solve to find the input 'x'

25 = -75 - 5x

5x = -75-25

5x = -100

Divide bothe side by 5

x = -20

Thus, the function's input = x = -20

5 0
3 years ago
The state of California takes about 8% of your income for income tax. How much of your money do you owe California in taxes each
posledela

Answer:

you can't answer it without knowing how much money they have to multiply it by the 8% to find out what you'll be paying out to California each month

Step-by-step explanation:

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6 0
2 years ago
How can you use an algebraic expression on a coordinate plane?
nydimaria [60]
Putting it in the middle sorry if it isnt right i never was really good at these but i tried.

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3 years ago
Pls help parents will ground me from everything if I don’t get me my homework done PLEASE
Nikitich [7]

Answer:

x=13 and y=sqrt338

Step-by-step explanation:

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