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Leokris [45]
2 years ago
5

Hey guys- need help in this one

Mathematics
2 answers:
oksano4ka [1.4K]2 years ago
8 0

Answer:

c

Step-by-step explanation:

x=5+i\sqrt{7} , y = 5-i\sqrt{7}\\ x^2-2xy+y^2=(x-y)^2\\ (x-y)^2=(2i\sqrt{7} )^2\\4.i^2.7\\-28

Galina-37 [17]2 years ago
7 0

Answer:

c

Step-by-step explanation:

given x = 5 + i\sqrt{7} then y = 5 - i\sqrt{7}

x² - 2xy + y² ← is a perfect square

= (x - y)² ← substitute values for x and y

= (5 + i\sqrt{7} - (5 - i\sqrt{7} )²

=  (5 + i\sqrt{7} - 5 + i\sqrt{7} )²

= (2i\sqrt{7} )²

= 2² × i² × (\sqrt{7} )²

= 4 × - 1 × 7

= - 28

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One of the two numbers is less than ten.
mars1129 [50]

Answer:

2

Step-by-step explanation:

7 0
3 years ago
Which expression is a difference of squares with a factor of 5x − 8? 25x2 − 16 25x2 16 25x2 − 64 25x2 64.
SpyIntel [72]

The product of the factors (5x − 8) and (5x + 8) is 25x² −  64. Then the correct option is C.

<h3>What is polynomial?</h3>

Polynomial is an algebraic expression that consists of variables and coefficients. Variable are called unknown. We can apply arithmetic operations such as addition, subtraction, etc. But not divisible by variable.

One factor of the polynomial is given which is 5x − 8.

Then the polynomial will be

Let the other factor be 5x + 8

Then their product will be

(5x − 8)(5x + 8)

(5x)² − 8²

25x² −  64

More about the polynomial link is given below.

brainly.com/question/17822016

6 0
2 years ago
Which step could be used to help isolate the variable in the following equation
makvit [3.9K]
The subtraction of 4 on both sides would isolate the term 1.1j, then the division of 1.1 on both sides would isolate j.
8 0
3 years ago
Read 2 more answers
Rina’s recipe uses 2 cups of sugar to make 2 ½ dozen cookies. Jonah’s recipe uses 2 ¼ cups of sugar to make 3 dozen cookies. Whi
WITCHER [35]

Answer:

Let's calculate the "cups of sugar per dozen cookies" ratio:

2 cups

---------- = 0.8  (Rina)        

  2.5                                  

2.25 cups

------------- = 0.75 (Jonah)

     3

Rina uses more sugar for a dozen cookies.

8 0
3 years ago
The diffrence between an integer p and (-5) is 1 find the value of p ​
Nastasia [14]

Solution:

<u>Note that:</u>

  • Given sentence: The difference between an integer p and (-5) is 1.

<u>Let's reread the sentence carefully.</u>

The difference between an integer p and (-5) is 1.

  • => p - (-5) = 1

<u>Change the sign.</u>

  • p - (-5) = 1
  • => p + 5 = 1

<u>Subtract 5 both sides:</u>

  • p + 5 = 1
  • => p + 5 - 5 = 1 - 5
  • => p = -4

4 0
2 years ago
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