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
Dennis_Churaev [7]
3 years ago
11

What should be added to x2 +xy+y2 to obtain 3x2 - 4xy - y2​

Mathematics
1 answer:
Alex787 [66]3 years ago
4 0

Answer:

2x² - 5xy - 2y²

Step-by-step explanation:

Subtract x² + xy + y² from  3x² - 4xy - y² to obtain the expression to be added

3x² - 4xy - y² - (x² + xy + y² ) ← distribute by - 1

=3x² - 4xy - y² - x² - xy - y² ← collect like terms

= 2x² - 5xy - 2y²

Thus

adding 2x² - 5xy - 2y² to x² + xy + y² gives 3x² - 4xy - y²

You might be interested in
What is the area of an isosceles trapezoid, if the lengths of its bases are 16 cm and 30 cm and the diagonals are perpendicular
kicyunya [14]

Call the point of intersection of the diagonals point X.

Each base is the hypotenuse of an isosceles right triangle whose sides are the diagonals and whose 90° angle is at X. The altitude of that triangle (⊥ distance to the base from X) is half the length of the hypotenuse. Then the height of the trapezoid is half the sum of the base lengths.

The area of the trapezoid is the product of the height and half the sum of the base lengths, hence is the square of half the sum of the base lengths.

... Area = ((16 cm +30 cm)/2)² = (23 cm)² = 529 cm²

4 0
3 years ago
What is 24/4 as a whole number
stiks02 [169]
4 fits into 24 6 times so 24/4 written as a whole number is 6! I hope this helped :D
7 0
3 years ago
What is the area of the kite? (This was all that was given)
lesya [120]
The area of a kite is (1/2) * x * y, where x and y are the length of the two diagonals. In this case, the length of the two diagonals are 10 ft and 2 ft.
<span>Plug that in the equation, we get 1/2 * 2 * 10. We multiply the 2 and 10 first to get 20, that leaves us with 1/2 x 20, which is 10, so the area of this kite is 10 ft squared.</span>
5 0
4 years ago
Read 2 more answers
The histogram displays how many students are in each classroom during homeroom. What percentage of classrooms have 25 students o
Lelechka [254]

Answer:

its 40% but since it's not there it could be 45%

Step-by-step explanation:

hope this helps

3 0
3 years ago
Read 2 more answers
Covert the following measurements 13 miles to yards
Molodets [167]
1 mile = 1760 yards
Therefore you must times 13 by 1760
13x1760 = 22880
4 0
4 years ago
Other questions:
  • Wendy thinks the perfect chocolate chip cookie has 353535 chocolate chips for every 555 ounces of dough. Cookie Club makes batch
    8·1 answer
  • Question #6 I can't figure it out.
    11·1 answer
  • Luis bught stock at $82.60. The next day, the price increased $19.00. This new price
    12·2 answers
  • Pls help <br> (The ratio of fruit juice one)
    5·1 answer
  • 3. For the function f(x) = -4x – 3, which of the following is f(-2)?
    8·1 answer
  • Is number 7 correct ? Please help
    12·1 answer
  • Katie has read 32% of a book. if she has read 80 pages, how many more pages does Katie have left to read?
    5·1 answer
  • How can we describe 3x-2 as an expression
    15·1 answer
  • Can you help me please
    10·2 answers
  • A real estate company owns 120 apartments which are fully occupied when the rent is $800 per month. Analytics indicate that for
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!