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zhenek [66]
3 years ago
11

Factorize completely the expression(h+2k)²+4k²-h²​

Mathematics
2 answers:
slega [8]3 years ago
8 0

Answer:

\rm 4k(2k+ h)

Step-by-step explanation:

A expression is given to us and we need to factorise it . The given expression is ,

\rm\implies (h+2k)^2+4k^2-h^2

Open the brackets using the identity, (a +b)² = a² + b² + 2ab , we have ;

\rm\implies h^2+4k^2+4hk + 4k^2 - h^2

Simplify ,

\rm\implies 8k^2+4hk

In the above expression 4k is common in both the terms , so that ,

\rm\implies \boxed{\pink{\frak{ 4k(2k+h) }}}

julsineya [31]3 years ago
5 0

The expression factorized completely is (h +2k)[(h+2k) + (2k-h)]

From the question,

We are to factorize the expression (h+2k)²+4k²-h²​ completely

The expression can be factorized as shown below

(h+2k)²+4k²-h²​ becomes

(h+2k)² + 2²k²-h²​

(h+2k)² + (2k)²-h²​

Using difference of two squares

The expression (2k)²-h²​ = (2k+h)(2k-h)

Then,

(h+2k)² + (2k)²-h²​ becomes

(h+2k)² + (2k +h)(2k-h)

This can be written as

(h+2k)² + (h +2k)(2k-h)

Now,

Factorizing, we get

(h +2k)[(h+2k) + (2k-h)]

Hence, the expression factorized completely is (h +2k)[(h+2k) + (2k-h)]

Learn more here:brainly.com/question/12486387

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A bulb can either be on or off. A board contains connected to a randomization circuit that lights up a random sequence every tim
kari74 [83]

The question is incomplete. The complete question is :

A bulb can either be on or off. A board contains 20 bulbs connected to a randomization circuit that lights up a random sequence every time it is turned on. What is the probability that all the lights will switch on ?

Solution :

It is given that :

There is board connected to = 20 bulbs

And one can either be put ON or put OFF.

Therefore the chance that a bulb is ON = $\frac{1}{2}$

It is given that every time a bulb turns ON, the board lights up in a random sequence.

Therefore, the probability of all the lights to be switched ON is given by :

$=\left(\frac{1}{2}\right)^{20}$

$=\frac{(1)^{20}}{(2)^{20}}$

$=\frac{1}{1048576}$

7 0
3 years ago
1.
cluponka [151]

Answer:

Probably c

Step-by-step explanation:

Tbh

6 0
3 years ago
When a warehouse opened, it had an inventory of 6,000 items. Every month, the inventory increases by 3,000 items.
ehidna [41]

Answer:

Step-by-step explanation: 90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on nine comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love you  

3 0
3 years ago
you purchase 2 action figures a week. you have 48 action figures, which is 75% of the total number of action figures you need to
notka56 [123]

Answer:

8 weeks

Step-by-step explanation:

48 is 75%

x is 100%

48×100=4800

75x=4800

x=4800:75

x=64

64-48=16

16:2=8

Answer is 8 weeks

7 0
3 years ago
X is normally distributed with a mean of 100 and a standard deviation of 15. What is the probability of randomly sampling a scor
VikaD [51]

Answer:

Using calculator: 0.0415

Using Z-score Table: 0.0418

Step-by-step explanation:

There are two ways you can solve this problem.

1. Use the normal distribution function on a calculator.

Entered values:

Lower Limit: 126

Upper Limit: 999999999999999... (To encompass all the data)

Standard Deviation: 15

Mean: 100

2. Find the Z score and look up probabilities on table.

Formula for Z score:

Z=\frac{x-mean}{standard deviation} \\\\Z= \frac{126-100}{15}=1.7333...

Z = 1.7333

This means that the value 126 is 1.733 standard deviations away from the mean. We can look this value up on the Z table to find its corresponding probability.

This will show us the probability of the random sampling being equal to or lower than 126.

P = 0.9582

So to find the probability of it being above, we simply just calculate the inverse as all probabilities on the curve = 1.

1-0.9582 = 0.0418

NOTE: Values found from the table will usually be a bit different from if you find it from a calculator, the one you need will depend on the method you use in class.

Hope this helped!

6 0
3 years ago
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