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I am Lyosha [343]
3 years ago
8

What is (x+3i)(x-3i)(x+1)(x-1) multiplied out?

Mathematics
1 answer:
morpeh [17]3 years ago
7 0
We can start with the first two sets

(x+3i)(x-3i) = x²-9i² then simplify it to x²+9

multiply the next two

(x+1)(x-1) = x²-1

then multiply those two together

(x²+9)(x²-1) = x∧4-x²+9x²-9

combine like terms x∧4+8²-9

that is your answer
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kakasveta [241]

Answer:

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Step-by-step explanation:

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5 0
2 years ago
4n - 2n = 4<br><br>what's the answer for this ?
Mademuasel [1]
Hey there!
First, we will do the subtraction with the two like terms on the left. I know they're like terms because although they have different coefficients, they have the same variable.
We have:
2n=4
Divide both sides by 3 to get:
n = 2
Hope this helps!
5 0
3 years ago
Read 2 more answers
Seven increased by the<br> product of two numbers
Kobotan [32]

Answer: x ≥ 5

Step-by-step explanation:

7 is increased by the product of a number and 3:  7 + 3x

Is at least 22:  ≥ 22

 

Your equation is: 7 + 3x ≥ 22

subtract 7 from both sides

3x ≥ 15

divide both sides by 3

x ≥ 5

8 0
4 years ago
The profits of a company are found by subtracting the company's costs from its revenue. If a company's cost can be modeled by 14
maksim [4K]
-.0002x²+26x-120,000

hope this helped ;)
4 0
3 years ago
Please solve the following quadratic equation and show your work: x^2 -x =30
saveliy_v [14]
Rewriting the equation as a quadratic equation equal to zero:
     x^2 - x - 30 = 0
We need two numbers whose sum is -1 and whose product is -30. In this case, it would have to be 5 and -6. Therefore we can also write our equation in the factored form
     (x + 5)(x - 6) = 0
Now we have a product of two expressions that is equal to zero, which means any x value that makes either (x + 5) or (x - 6) zero will make their product zero.
     x + 5 = 0  => x = -5
     x - 6 = 0  => x = 6
Therefore, our solutions are x = -5 and x = 6.
8 0
3 years ago
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