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Yakvenalex [24]
3 years ago
15

X^2 + 4x = 6 solve by completing the square plz show step by step

Mathematics
2 answers:
Hitman42 [59]3 years ago
8 0

Answer:

x = -2 ±sqrt( 10)

Step-by-step explanation:

x^2 + 4x = 6

Take the coefficient of x

4

Divide by 2

4/2 =2

Square it

2^2 =4

Add this to each side

x^2 + 4x+4 = 6+4

Take the 4/2 term which is the factor inside the (x+   )^2

(x+2)^2 = 10

Take the square root of each side

sqrt((x+2)^2) =±sqrt( 10)

x+2 = ±sqrt( 10)

Subtract 2 from each side

x+2-2 = -2±sqrt( 10)

x = -2 ±sqrt( 10)

MakcuM [25]3 years ago
7 0

Answer:

x= +/- \sqrt(10) - 2

Step-by-step explanation:

use the formula (b/2) in order to create a new term.

Solve for x by using the term to complete the square.

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Which operation should be performed<br> first to solve the inequality below?<br> -3x + 5 = 23
Ne4ueva [31]

Answer:

Pass the number 5 to the other side with te opposite sign in order to leave the x alone

it would be

-3x = 23-5

Then you divide by -3 and thats ur answer

4 0
3 years ago
Read 2 more answers
BAYES FORMULA
djverab [1.8K]

Answer:

republicans

Step-by-step explanation:

Given, there are 60% democrats and republicans 40%

60% of the democrats voted for democrats and 95% of the republican voted for their candidate

therefore

% of votes that went for Democrats =0.6*0.6=0.36 = 36%

% of votes that went for Republics=0.4*0.95=0.38 = 38%

Since the republicans have more % of votes  thus Republic's mayor runs city hall.

6 0
3 years ago
What is 1-1 please help
vladimir1956 [14]

Answer:

0

Step-by-step explanation:

1-1=0

It's common knowledge that 1-1=0 so I dont know how to explain it any further

4 0
4 years ago
Read 2 more answers
Help on question 2 please :/
irakobra [83]
40% is close to 50% which is = to 1/2
So just divide 60 by 2. which would be around 30

this is the best way i could explain, I hope this helps
8 0
3 years ago
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In a certain Algebra 2 class of 28 students, 16 of them play basketball and 15 of them play baseball. There are 8 students who p
kicyunya [14]

20/28 = 5/7

Step-by-step explanation:

Step 1 :

Total number of students in the algebra class is 28

Given that the number of students who play neither sport = 8

Step 2 :

Probability that a student randomly chosen does not play any sport is obtained by number of students who play neither sport/ total number of students

Hence probability is 8/28

Step 3 :

The probability that a student randomly chosen plays either basketball or base ball = 1 - 8/28  = 20/28 = 5/7

7 0
3 years ago
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