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
Rzqust [24]
3 years ago
13

What number must you add to the polynomial below to complete the square? x2 - 3x

Mathematics
1 answer:
USPshnik [31]3 years ago
7 0
The coefficient of the x-term is -3. Add the square of half of that.
.. (-3/2)² = 9/4 . . . . . . the number you need to add.

x² -3x +9/4 = (x -3/2)²

_____
If the x² term has a coefficient other than 1, you need to factor that out first and deal with the remaining binomial. For example,
.. 2x² -6x = 2(x² -3x)
For this you would need to add 9/4 inside parentheses to get
.. 2(x² -3x +9/4) = 2(x -3/2)²
Of course, to keep the original value, you would need to subtract 2*(9/4) outside parentheses.
.. 2x² -6x = 2(x -3/2)² -9/2
You might be interested in
22x+70=17x-95 show step by step please
GalinKa [24]

22x + 70 = 17x - 95
Move variables to the left by adding their opposites to both sides. Eliminate the opposites.

22x - 17x + 70 =  - 95
Move constants to the right by adding their opposites to both sides. Eliminate the opposites.

22x - 17x =  - 95 - 70
Collect the like terms by subtracting their coefficients and numbers.

5x =  - 95 - 70
Calculate the sum or difference. Extract the negative sign from the expression. Add the numbers.

5x =  - 165
Divide both sides of the equation by 5 and calculate the quotient.

x =  - 33
3 0
3 years ago
What is the measure of angle 4?
nata0808 [166]

Answer:

m<4=104 degrees

Step-by-step explanation:

Angles 3 and 4 are both supplementary angles. They both add up to 180 degrees. So, if you know one of them then you can just do 180-measure of angle 3. 180-76=104 degrees

8 0
3 years ago
Read 2 more answers
I picked the yellow one, was I correct?
nikitadnepr [17]

Answer:

the answer was 9 (red)

Step-by-step explanation:

5 0
3 years ago
What is 3<br> /6converted to a decimal
drek231 [11]

Answer:

3/6 converted to a decimal would be 0.5

Step-by-step explanation:

Hope this helps. :)

5 0
2 years ago
please can someone help me with this question? i will mark brainliest and i would also really appreciate it! :)
Sloan [31]

Answer:

y ≤ 3x- 1

Step-by-step explanation:

The line is solid, so your answer must have a ≤ or ≥ symbol. And the area below the line is shaded so you would also know you answer must have a ≤ or < symbol.

8 0
2 years ago
Read 2 more answers
Other questions:
  • The formula to convert F° to C° is C = 5/9(F-32). Convert 50°C to °F.
    5·2 answers
  • Find the slope of each line x=1
    6·1 answer
  • What is the percent decrease between 80 and 64
    6·2 answers
  • Given that (2x-1)(x+5)=2x^2-mx-5, what is the value of m​
    5·1 answer
  • Please help me out with this problem!
    6·1 answer
  • (08.01) Line H is represented by the following equation: 2x + 2y = 8 What is most likely the equation for line K so the set of e
    9·1 answer
  • The equation of a straight line is 5y=7x+3 <br> what is the gradient of the line?
    5·1 answer
  • In a concert hall, there are 22 seats in the first row. There are 27 seats in the second
    7·1 answer
  • Helppppppp plxxxxxxvvvvvvvvv​
    5·2 answers
  • There are 3,600 seats in an arena. Tier 1 has 1,200 seats. Tier 2 has 1,400 seats. Tier 3 has 1,000 seats. What fraction of the
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!