1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
love history [14]
3 years ago
8

X² + x = 12show the steps please​

Mathematics
2 answers:
Anna35 [415]3 years ago
8 0

Answer:

x1 = -4

x2 = 3

Step-by-step explanation:

x^{2} + x = 12\\x^{2} +x-12=0\\x^{2} +4x-3x-12=0\\x*(x+4)-3(x+4)=0\\(x+4)*(x-3)=0\\x+4= 0  \\x-3=0\\x=-4 \\x=3\\x1=-4 \\x2=3

malfutka [58]3 years ago
3 0

Step-by-step explanation:

=> x² + x = 12

=> x² + x -12 = 0

=> x² + 4x - 3x -12 = 0

=> x ( x + 4)-3(x + 4) = 0

=> ( x + 4)(x-3)=0

=> x = 3 , -4

You might be interested in
The lengths of the sides of a triangle are 3, 3, and the square root 3. Can the triangle be a right triangle?
Readme [11.4K]
First find the decimal equivalent of square root 3: SQRT(3) = 1.732 ( roughly)
 
If the base and height were each 3, then the hypotenuse would need to be:

3^2 + 3^2 = C^2
9 + 9 = C^2
18 = C^2
C = SQRT(18) = 4.24

This is larger than sqrt(3), so this cannot be a right triangle.


If one leg was 3 and the other leg was sqrt(3) then the hypotenuse would be:
3^2 + 1.73^2 = C^2
9 + 3 = C^2
12 = C^2
C = SQRT(12) = 3.46

This is larger than 3, this cannot be a right triangle.

The answer is b) no.





8 0
4 years ago
Read 2 more answers
Subtract<br> (3x2 + 2x – 9) - (4x2 - 6x + 3)<br> Enter your answer, in standard form in the box.
ss7ja [257]

Answer:

2

Step-by-step explanation:

7 0
3 years ago
PLEASE HELP WILL GIVE BRAINLIEST
vfiekz [6]

Answer:

The slope is 3/2 and the y intercept is 4

Step-by-step explanation:

We want to write in the form

y = mx+b where m is the slope and b is the y intercept

-3x+2y = 8

Add 3x to each side

-3x+3x+2y = 3x+8

2y = 3x+8

Divide each side by 2

2y/2 = 3x/2 + 8/2

y = 3/2x +4

The slope is 3/2 and the y intercept is 4

7 0
3 years ago
How to find domain and range of a graph​
Nadya [2.5K]

Answer:

the domain refers to the set of possible input values, the domain of a graph consists of all the input values shown on the x-axis. The range is the set of possible output values, which are shown on the y-axis.

5 0
3 years ago
What is the sum of the infinite series:<br><br> 2+1+1/2+1/4+1/8+...
Temka [501]

Answer:

31/8

im very sure

7 0
3 years ago
Other questions:
  • Martin randomly selects 3 days of the week to work at his uncle's farm.
    15·1 answer
  • What is 13 28/30 simplest form
    7·1 answer
  • Reyna runs a textile company that manufactures T-shirts. The profit, p, made by the company is modeled by the function p=s^2+9s-
    13·2 answers
  • 5^7 + 5^6 = _* 6<br><br> AWARDING BRAINLIEST
    10·2 answers
  • A computer store buys a computer system at a cost of ​$370.80. The selling price was first at $618 ​, but then the store adverti
    12·2 answers
  • A technical machinist is asked to build a cubical steel tank that will hold 410 L of water. Calculate in meters the smallest pos
    7·1 answer
  • Calculator<br> What is M<br> Put your answer in the box <br> °
    13·2 answers
  • Question 3 Multiple choice worth 4 pomis
    7·1 answer
  • Hi im gonna use all my points on this
    8·2 answers
  • Which of the following equations demonstrate the multiplication property of equality for the equation x = 2? Check all
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!