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
UNO [17]
2 years ago
15

Expand this expression (x-y)²​

Mathematics
1 answer:
pochemuha2 years ago
8 0

Answer:

x^2 - 2xy + y^2.

Step-by-step explanation:

(x - y)^2

= (x - y)(x - y)

= x(x -y) - y(x - y)

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

= x^2 - 2xy + y^2.

You might be interested in
How do I do 8b(ii) ? Please help me thank you!
Mila [183]
Step One
======
Find the length of FO (see below)

All of the triangles are equilateral triangles. Label the center as O
FO = FE = sqrt(5) + sqrt(2)

Step Two
======
Drop a perpendicular bisector from O to the midpoint of FE. Label the midpoint as J. Find OJ

Sure the Pythagorean Theorem. Remember that OJ is a perpendicular bisector.

FO^2 = FJ^2 + OJ^2
FO = sqrt(5) + sqrt(2)
FJ = 1/2 [(sqrt(5) + sqrt(2)]                                           \
OJ = ??

[Sqrt(5) + sqrt(2)]^2 = [1/2(sqrt(5) + sqrt(2) ] ^2 + OJ^2
5 + 2 + 2*sqrt(10) = [1/4 (5 + 2 + 2*sqrt(10) + OJ^2
7 + 2sqrt(10) = 1/4 (7 + 2sqrt(10)) + OJ^2      Multiply through by 4
28 + 8* sqrt(10) = 7 + 2sqrt(10) + 4 OJ^2    Subtract 7 + 2sqrt From both sides
21 + 6 sqrt(10) = 4OJ^2   Divide both sides by 4
21/4 + 6/4* sqrt(10) = OJ^2
21/4 + 3/2 * sqrt(10) = OJ^2 Take the square root of both sides.
sqrt OJ^2 = sqrt(21/4 + 3/2 sqrt(10) )
OJ = sqrt(21/4 + 3/2 sqrt(10) )

Step three
find h
h = 2 * OJ
h = 2* sqrt(21/4 + 3/2 sqrt(10) ) <<<<<< answer.


7 0
3 years ago
A cylinder has a diameter of 8 inches and a volume of 1287 cubic inches. What is the height of
fredd [130]

Answer:

25.62

Step-by-step explanation:

the answer is rounded and pi was 3.14 to solve this

8 0
3 years ago
Find the midpoint of the coordinates (-2,1) and (4,-4)
kow [346]
  • (-2,1)
  • (4,-4)

\\ \rm\longmapsto P(x,y)

\\ \rm\longmapsto \left(\dfrac{-2+4}{2},\dfrac{1-4}{2}\right)

\\ \rm\longmapsto \left(\dfrac{2}{2},\dfrac{-3}{2}\right)

\\ \rm\longmapsto \left(1,\dfrac{-3}{2}\right)

6 0
2 years ago
Round the following number to the nearest tens and hundreds
asambeis [7]

Answer: 1.) 57342

Tens = 57340

Hundreds = 57300

2.) 76564

Tens = 76560

Hundreds = 765600

3.) 95634

Tens = 95630

Hundreds = 95600

4.) 85756

Tens = 85760

Hundreds = 85800

5.) 63526

Tens = 63530

Hundreds = 63500

Step-by-step explanation:

3 0
2 years ago
Pls help meee<br>thank you thank you thank you thank you
olga_2 [115]

Answer:

See below

Step-by-step explanation:

11 box 1: 12

11 box 2: 101

12 box 1: 80

12 box 2: 80

12 box 3: 80

13 box 1: 16

13 box 2: 16

13 box 3: 76


20 = y + 12

20 - 12 = y + 12 - 12

8 = y


x + 2 = 19

x + 2 - 2 = 19 - 2

x = 17


z - 313 = 176

z - 313 + 313 = 176 + 313

z = 489

6 0
3 years ago
Read 2 more answers
Other questions:
  • Which ratio correctly compares 3 yards to 27 feet, when the lengths are written using the same units?
    10·2 answers
  • You need to prepare 30mL solution of a 1:8 syrup solution. You have on hand 50% syrup solution and a 1:20 soda solution. How man
    5·1 answer
  • Given that a, b, and c are non-zero real numbers and a + b ≠ 0, solve for x.<br><br> ax + bx - c = 0
    5·2 answers
  • A graph shows Round Target on the x-axis, from 0 to 10, and Square Target on the y-axis, from 0 to 10. A dashed straight line ha
    13·2 answers
  • The formula for the area of a triangle is , where b is the length of the base and h is the height. Find the height of a triangle
    10·2 answers
  • A digital camcorder repair service has set a goal not to exceed an average of 5 working days from the time the unit is brought i
    6·1 answer
  • ANSWER PLEASE i need help i will mark brainliest
    12·1 answer
  • Find all polar coordinates of point P where P = (9,pi divided by 5).
    11·1 answer
  • PLZ HELP ME ITS ALMOST DUE
    8·1 answer
  • Write the first six terms of the sequence f(n)=n^3+2​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!