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k0ka [10]
3 years ago
10

If x/y + y/x = -1 , ( x unequal y, y unequal 0) then the value of x^2 - y^2 is?

Mathematics
2 answers:
BigorU [14]3 years ago
8 0

\dfrac{x}{y}+\dfrac{y}{x}=-1|\cdot xy\\\\ x^2+y^2=-xy\\\\ x^2+xy+y^2=0\\\\ \boxed{x^3-y^3=(x+y)(x^2+xy+y^2)}\\ \Downarrow\\ x^3-y^3=(x+y)\cdot 0\\\\ \boxed{\boxed{x^3-y^3=0}}

Maurinko [17]3 years ago
3 0

Take your original equation \frac{x}{y} +\frac{y}{x} =-1

and multiply both sides by xy to remove the fractions. You are left with

x^2+y^2=-xy

So, x^2+y^2=-xy

Update: There is no numerical answer that can be found without being given a value for either x or y

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Answer:

You find the area of all the faces of the square pyramid, then add them together to get the surface area.

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3 years ago
Can someone help please
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Answer:

6

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base + 2(legs) = 56  (2 legs are the same because it's isosceles)

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5 0
2 years ago
Which expression shows 36 + 63 as the product of their greatest common factor and the sum of two whole numbers with no common fa
jarptica [38.1K]

Hey!

Hope this helps...

~~~~~~~~~~~~~~~~~~~~~~~~~~

The first thing we know is that all the answers equal 99, so we cannot cross any answer off, however, what we want to know is what answer (after distribution) looks like 36 + 63...

A.) 11(3 + 6) > 33 + 66

Does 33+66 look like 36+63?

NO

B.) 9(4 + 7) > 36 + 63

Does 36+63 look like 36+63?

YES

C.) 11(4 + 5) > 44 + 55

Does 44+55 look like 36+63?

NO

D.) 3(15 + 18) > 45 + 54

Does 45+54 look like 36+63?

NO

So...

The answer is: B.) 9(4 + 7)


4 0
3 years ago
There are 1560 students enrolled at greenwood middle school if 85% of these ride the bus how many does not ride the bus
loris [4]

Answer: 1326 students won't come to school

Step-by-step explanation:

All you have to do is find out 85% of 1560 which is 1326 students!

4 0
3 years ago
The pieces of a puzzle are placed half by Giulio, one fifth by Marco and Fabrizio in equal parts, while Michele arranges on the
denis23 [38]

Answer:

Not exactly sure but I think it should be 30 pieces

Step-by-step explanation:

3 0
1 year ago
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