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Jlenok [28]
4 years ago
5

Factor completely 2x^2+4x-2

Mathematics
1 answer:
Aleks04 [339]4 years ago
8 0

Answer:

2x^2+4x-2  =  2 * (x - 1 -\sqrt{2}) * (x - 1 + \sqrt{2})

Step-by-step explanation:

Factor completely 2x^2+4x-2

2x^2+4x-2 =  2* (x^2 + 2x - 1)

x = 1  +  root( 4 - 4*(-1))/2

x = 1 + root(2)

and x = 1 - root(2)

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Please please help. I have a bunch of these and I don’t understand it at all
shtirl [24]
The correct option is: Option (B) \sum_{i=1}^{7} (5i-2)

Explanation:

First thing is that the difference between each number in the series with the next number is 5. It means it must be the multiple of 5. There are two options that contain multiples of 5: Option B and Option D. Now in the option D, the upper limit is 6. If we put 6 in the expression: 5(6)-2, the last term would be 28. However in the series given in the question, the last term is 33. Hence 5(7) - 2 = 35 - 2 = 33 which is Option B.

When i=1: 5(1)-2 = 3
When i=2: 5(2)-2 = 8
When i=3: 5(3)-2 = 13
.
.
When i=7: 5(7)-2 = 35-2 = 33
Hence the correct option is (B).
3 0
4 years ago
Adam got a iPad Pro. The original price is $999. The iPad is 35 percent off. What’s the sale price?
AlexFokin [52]

Answer:

The sale price is $649.35.

Step-by-step explanation:

Multiply the price of the iPad Pro by the discount in decimal form subtracted from 1.

Price of iPad Pro: 999

discount in decimal form subtracted from 1:

35% = 0.35

Subtract from 1.

1 - 0.35 = 0.65

Multiple the two values:

Sale price = 999 * 0.65 = 649.35

The sale price is $649.35.

5 0
3 years ago
Two thirds Of a number Is 3 1/2 ( three And a half) more than three eighths Of The number. Find The number.
antiseptic1488 [7]
\frac{2}{3}x - 3.5 = \frac{3}{8}x
\frac{2}{3}x - \frac{3}{8}x = 3.5
\frac{2}{3}x - \frac{3}{8}x = \frac{7}{24}x
\frac{7}{24}x = 3.5

Multiply 3.5 by 24 and then divide by 7 and you get

x = 12
3 0
4 years ago
Read 2 more answers
Find the values of 3*(* stands for x) and (1/3)*(* stands for x) for different values of x. Values of x are: 1, 2, 3, 4
kumpel [21]
If x=1
1/3x = 1/3
3x = 3

If x=2
1/3x=2/3
3x=6

If x=3
1/3x=1
3x=9

If x=4
1/3x=1 1/3
3x+12
7 0
3 years ago
A flower bed is in the shape of a triangle, with a base of 15 feet and a height of 9 feet. What is the area of the flower bed?
Mama L [17]
Okay so the formula for this is going to be 1/2*base*height. The * means multiply.

so to do it easily lets start with the whole numbers.
15*9=135
so we take that and divide it by two because that it the same as multiplying by 1/2
135/2=The area will be 67.5!!!
Hope this helps you
6 0
3 years ago
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