3 years ago

Please help ASAP! Will give BRAINLIEST! Please read the question THEN answer correctly! No guessing.

Mathematics

1 answer:

ElenaW [278]3 years ago

3 0

Answer:

x = -2 ±sqrt(7)

Step-by-step explanation:

3x^2 +12 x = 9

Divide each side by 3

3x^2 /3 +12x/3 = 9/3

x^2 +4x = 3

Take the coefficient of x

Divide by 2

4/2 =2

Square it

2^2 =4

Add it to each side

x^2 +4x+4 = 3+4

x^2 +4x+4 = 7

(x+2)^2 = 7

Take the square root of each side

x+2 = ±sqrt(7)

Subtract 2 from each side

x+2-2 = -2 ±sqrt(7)

x = -2 ±sqrt(7)

You might be interested in

Your friend has improved in his math class. On his first test he scored 50 points, and then he scored 53, 56, 59, and 62 points

emmainna [20.7K]

Answer:

Step-by-step explanation: I think you skip count by 50s or something like that. So, it has to be 64.

3 0

3 years ago

Which inequality has no solution?<br> 6(x+2) > x-3<br> 3+4x2(1+ 2x)<br> -2(x+6) X-9 <3(x-3)

Juli2301 [7.4K]

Answer:

$6(x + 2) > x - 3$

$6x + 12 > x - 3$

$6x - x > - 12 - 3$

$5x > - 9$

$3 + 4 \times 2(1 + 2x)$

$3 + 8(1 + 2x)$

$3 + 8 + 16x$

$11 + 16x$

$- 2(x + 6)x - 9 < 3(x - 3)$

$- 2( {x}^{2} + 6x) - 9 < 3x - 9$

$- 2 {x}^{2} - 12x - 9 < 3x - 9$

5 0

3 years ago

Which statement is true?

iVinArrow [24]

Answer:

the answer is " the slope of the function A is less then the slop of the function B

hope it helps

5 0

3 years ago

Read 2 more answers

Zach has a z-score of -1.5 <br> What is his height in inches

larisa86 [58]

Multiply the z-score by the standard deviation:

2 x -1.5 = -3

Now add that to the mean:

49 + -3 = 46 inches.

6 0

3 years ago

Read 2 more answers

Ardit has 8 chapters of a book left he reads two thirds of a chapter a day how many days does it take to finish the book

nordsb [41]

12 days

8 / (2/3)

or

it takes 3 days to read 2 chapters so
3 X 4 = 12

6 0

3 years ago

Read 2 more answers