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BigorU [14]
3 years ago
5

Factorise fully

ign="absmiddle" class="latex-formula">
Mathematics
2 answers:
Darina [25.2K]3 years ago
6 0

a^2-b^2=(a+b)(a-b)

a=y b=2

3y(y+2)(y-2)

swat323 years ago
3 0

Answer:

{3y}^{3}  - 12y \\  = 3y( {y}^{2}  - 4) \\  = 3y( {y}^{2}  -  {2}^{2} ) \\  = 3y(y - 2)(y + 2) \\  = 3y(y + 2)(y - 2)

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The area of a square in 169 square centimeter. What's its perimeter? Pls explain how you found the answer​
Lubov Fominskaja [6]

Answer:

Since the area of the square is 169 you think what times what equals 169 which is 13, so 13*13=169,

which makes your length and width 13 so 13*4= 52centimeters

52 centimeters

Step-by-step explanation:

4 0
4 years ago
A bank account has an initial deposit of $14,000. After 8 years, the bank account
Kamila [148]

Answer:

2.3%

Step-by-step explanation:

18000 = 15000( 1 + i)^8

Divide both sides by 15000

1.2 = (1 + i)^8

Take both sides to the 1/8 power

1.2^(1/8) = 1 + i

1.023051875220463 = 1 + i

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i = 0.023051875220463

~ 2.3%

8 0
3 years ago
An equation of the form 7/8 = x/9 is called a/an_________
anygoal [31]

Answer:

Proportion.

Step-by-step explanation:

Sorry for the late answer! I hope this helps! :)

4 0
3 years ago
A rectangular athletic field is twice long as it is wide the perimeter is 90 yard dismention?
Shkiper50 [21]
Ah well this would look like 2(30) + 30 = 90 aka 2L + W = 90
5 0
3 years ago
If y = -1, what is - 3y - 9 equivalent to?​
stiv31 [10]

Answer:

-6

Step-by-step explanation:

Plug in (-1) for y: -3(-1) - 9

Simplify: Negative x Negative = Positive

-3(-1) = 3 so... 3-9

3 - 9 = -6

-3y - 9 is equivalent to -6

5 0
3 years ago
Read 2 more answers
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