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MaRussiya [10]
2 years ago
7

Given 2x²=-8, x is DONE ✔

Mathematics
1 answer:
mr_godi [17]2 years ago
4 0

2x {}^{2}  =  - 8 \\ x {}^{2}  =  \frac{ - 8}{2}  \\ x {}^{2}  =  - 4 \\ x = ± \sqrt{ - 4}  \\ x_{1} = 2i \:  \:  \:  \:  \:  \: x_{2}  =  - 2i

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If (3x2 + 22x + 7) ÷(x + 7) = 3x + 1, then (x + 7)( ) = . The check of the polynomial division problem shows that the product of
azamat

Answer:

(x + 7) * (3x + 1) = (3x^2 + 22x + 7)

Step-by-step explanation:

Given

(3x^2 + 22x + 7) \div (x + 7) = 3x + 1

(x + 7) * (\ ) = [\ ]

Required

Complete the blanks

We have:

(3x^2 + 22x + 7) \div (x + 7) = 3x + 1

Rewrite as:

\frac{(3x^2 + 22x + 7) }{ (x + 7)} = 3x + 1

Cross multiply

(x + 7) * (3x + 1) = (3x^2 + 22x + 7)

8 0
3 years ago
Read 2 more answers
The sum of the digits of a two-digit number is 11. The number obtained by interchanging the digits exceeds twice the original nu
Mumz [18]
Cool problem

x and y are the digits
x+y=11
yx=2(xy)+34
I'm not sure how to solve this using legit math so use trial and error

the 1 digit numbers that could be possible are
9,2
8,3
7,4
6,5
5,6
4,7
3,8
2,9
all of them add up to 11

the pairs obtained by swiching the number are
92 and 29
83 and 38
74 and 47
65 and 56

we find which ones are equal when we subtract 34 from the larger number and divide by 2
92-34=58
58/2=29
92 and 29 work

83-34=49
49/2=24.5 not equal to 38 not work

74-34=40
40/2=20 47 not equal to 20 so doesn't work

65-34=31
31/2=15.5 not equal to 56 so doesn't work



the origonal number is 29
4 0
4 years ago
True or false 6,859^1/3 can be written as square root 3 19^3
Dennis_Churaev [7]
6859^{ \frac{1}{3}}

Using the index law a^{ \frac{m}{n}} =  (\sqrt[n]{a} )^m

\sqrt[3]{6859}=19, so we can also write this as
( \sqrt[3]{19^3} )

Answer: TRUE

7 0
3 years ago
Kierra drew a line that is 3 times four-sevenths inches long. Which fraction represents the same length?
Svetradugi [14.3K]

Answer: \frac{12}{7} inches

Step-by-step explanation:

3 × \frac{4}{7}

= \frac{3 x 4}{1 x 7}

= \frac{12}{7}

= 1\frac{5}{7}

5 0
3 years ago
How to write a decimal in words. 1.99
Andrej [43]
One and ninety nine hundredths
8 0
3 years ago
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