1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vedmedyk [2.9K]
3 years ago
15

If 3x^2+3y^2=42 and xy =-15.Find the value (x-y)^2

Mathematics
1 answer:
Alexxandr [17]3 years ago
4 0

Answer:

44

Step-by-step explanation:

Given, 3x^2 + 3y^2 = 42

=>3(x^2 + y^2) = 42 =>x^2 + y^2 = 42/3= 14

Thus,

= (x - y)^2

= x^2 + y^2 - 2xy

= (x^2 + y^2) - 2xy

= 14 - 2(-15)

= 14 + 30

= 44

You might be interested in
Factor yz + 6 + y +6z.<br> z + 1)(y + 6)<br> (z - 1)(y + 6)<br> (z + 6)(y - 1)
Sedbober [7]
The answer is the first one: (z+1)(y+6).

Explanation:

yz + 6 + y + 6z

= yz + y + 6 + 6z

= y(z+1) + 6(1+z)

= (z+1)(y+6)

For (z+1), you can also write (1+z), it doesn’t matter.

Hope it helps!

8 0
3 years ago
20)
lyudmila [28]
The answer is B because because 12x12=144 and 13x13=169 and nothing can multiply it’s self to become 156
4 0
3 years ago
Read 2 more answers
Judy can decorate 3 cakes in 5 hours. Which graph represents this same rate?
mojhsa [17]

Answer:

The first one with the pink background

Step-by-step explanation:

It's the only one that matches perfectly

3 0
3 years ago
Read 2 more answers
Simplify and evaluate without a calculator. 3*(m-4)-n*(m-4) if m=5 and n=3
Katarina [22]

Answer:

0

Step-by-step explanation:

3*(m-4)-n*(m-4)   m = 5, n = 3

3*(5-4)-3*(5-4)

3*(1)-3*(1)

3-3

0

6 0
2 years ago
Read 2 more answers
What are the similarities between the two lines
zaharov [31]
The first blank is proportional because <span>two quantities is one in which the two quantities vary directly with one and other. </span>If<span> one item is doubled, the other, related item is also doubled. Because of this, it is also called a direct variation. </span>
6 0
3 years ago
Other questions:
  • If the temperature of gas increases , the volume of that gas __________.
    14·2 answers
  • A bag contains four red marble, five blue marbles, and two green marbles. if one marble is chosen randomly, what is the probabil
    13·2 answers
  • Can any one help me answer this Math question ?
    8·1 answer
  • Find the greatest common factor of the expressions.<br> 6y^6z^8, -8y^4z^8
    14·1 answer
  • What is the answer please
    10·1 answer
  • Write the expressions <br>the prouduct of r and 15​
    9·1 answer
  • Choose the correct compound inequality for the graph below
    15·1 answer
  • Ldentify the domain and range of each function.
    5·2 answers
  • There are 198 calories in 4 ounces of vanilla ice cream. How many calories are in 6 ounces of vanilla ice cream?
    8·1 answer
  • Find the equation of the line passing through (1,4) and (-2,-1).
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!