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mash [69]
2 years ago
11

Làm ơn hãy giúp tôi (a+b)² (a-b)²

Mathematics
2 answers:
marysya [2.9K]2 years ago
8 0

Answer:

(a + b) ^{2}  =  {a}^{2}  + 2ab +  {b}^{2}  \\ (a - b) ^{2}  =  {a {}^{2}  - 2ab +  {b}}^{2}

Step-by-step explanation:

hopethe answer helped you :)

d1i1m1o1n [39]2 years ago
4 0

Answer:

(a+b)² = a²+2ab+b²

(a-b)² = a²-2ab+b²

Step-by-step explanation:

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7th-grade math help me, please :(
IgorC [24]

Answer:

71 remainder 80

Step-by-step explanation:

\frac{28480}{400}=71\:remainder\:80\\\\\frac{28480}{400}=71\frac{80}{400}\\

7 0
3 years ago
Read 2 more answers
Will the product of a positive number and a negative number be positive or negative? Why?
MA_775_DIABLO [31]

Answer:

negative

Step-by-step explanation:

positive * positive = positive

negative * positive = negative

negative * positive = negative

5 0
3 years ago
A rectangular floor is 18ft long and 12 ft wide. Lamar wants to carpet the floor with carpet tiles sold by square yard. Use the
WITCHER [35]

Solution

The dimension of the rectangular floor is 18ft long and 12 ft wide

Using the conversion table

It is given that 1yd =3 ft

This shows that

12 feet will be equivalent to

\frac{12}{3}=4yd

Also 18ft will be equialent to

\frac{18}{3}=6yd

Therefore the new dimension is 6 yard by 4 yard

The area will be

A=6\times4

Therefore the required area is

A=24yd^2

5 0
1 year ago
Sum of 6 divided by a number and that number divided by 6
Korvikt [17]
The sum is :
6 / x + x / 6 =
= ( 6 * 6 ) + ( x * x ) / 6 x = 
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Answer: ( 36 + x² ) ( 6 x ) 
7 0
3 years ago
What is the surface area of the figure? Use 3.14 for π.
fredd [130]

Answer:

Option 3

Step-by-step explanation:

We want to work out the surface-area

This is a cylinder and the formula for the surface area of a cylinder is :

2πrh+2πr^2

^ means to the power of

The radius is 15

The length is 18

2(3.14)(15)(18) + 2(3.14){15}^2

Part 1:

(6.28)(15)(18)

(6.28)(270)

1695.6

Part 2:

First, we do the exponents,

15^2 = 225

(6.28)(225)

1413

Part 3:

1695.6 + 1413 = 3108.6

Answer: 3108.6

Hope this helps :)

6 0
3 years ago
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