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weqwewe [10]
3 years ago
12

Solve x^2−4x−12=0 by completing the square. PLEASE HELP QUICK WILL GIVE BRAINLIEST

Mathematics
2 answers:
Arisa [49]3 years ago
8 0

Answer:

x= 6 and x=-2

Step-by-step explanation:

find the two factors that when multiplied will get -12 and when summed up will get -4.

so -6 and 3

(xsquare-6) +(2x -12)=0

x(x-6)+2(x-6)=0

(x-6)=0 (x+2)=0

group like terms

x=6. x=-2

Sliva [168]3 years ago
4 0

Answer:

The answer is B

Step-by-step explanation:

If u use calculator,u will get the ans as x¹=6 and x²= -2 but u have to change it to the opposite which means negatif to positive(-2=2) and positive to negative(6= -6).Hope u can understand...sorry,English isn't my first language

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LekaFEV [45]

Answer:

0.824

Step-by-step explanation:

hope it helps u....

8 0
3 years ago
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a satelite moves at the speed of 27,000 kilometers per hour what 4 number could be the actually speed of the satelite
Anvisha [2.4K]
If the satellite moves at a speed of 27,000 km p/h, your answer depends on the question.

This could be written in an algebraic expression, such as:

27,000x = S                 [for S stands for the ultimate speed of the satellite]

Of course, if this is a 3rd grade level question, I highly doubt they have even gotten started to including the alphabet into math. 

So, I would suggest plugging 4 into X.
To explain this to her, just say that the speed needs to be multiplied by the amount of hours it has traveled. (I got 4 because there is a '4' in the question instead of 'for').

Meaning,  
27,000 x 4 = 108,000 km per 4 hours

If her teacher decides to ask why that number, have her explain the question did not make sense so she plugged in a 4 to find an answer to a certain amount of hours. 

Hope that helps a bit with the confusion!
7 0
3 years ago
I really need help a and b
Ivan

Using BEDMAS

a) 6+4(2+3)^2
    6+4(5)^2  - Eliminate addition in bracket
    6+4(25)  - Execute the exponent
    6+100  - Mulitplying
    106 - Addition

b)(6+4)(2+3)
   (10)(5) -Addition in BRACKETS done
   50 - Mulipication

If you found that helpful please rate as "Brainiest" if not comment below :)

5 0
3 years ago
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Maurinko [17]

Answer: No, -1 is not greater than -1/2

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A ray is a defined term because it
m_a_m_a [10]

Answer:

Option D is correct.

Step-by-step explanation:

Given that

A ray is a defined term we have to give the reason of the above statement.

A ray is a line or a part of a line that has one endpoint which we defined and other goes on infinitely in only one direction.

One of the example is a sun's ray of light in space. Light from the sun originates and travels from the sun, and its path extends infinitely.\

Hence, we say that "A ray is a defined term because it travels forever in one direction"

Option D is correct.

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