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
KatRina [158]
3 years ago
11

What number must be added to the expression below to complete the square? x² - 18x

Mathematics
1 answer:
kiruha [24]3 years ago
5 0

Answer:

\boxed {\boxed {\sf 81}}

Step-by-step explanation:

The standard form of a quadratic is:

ax^2+bx+c

To complete the square, the a (leading coefficient) must be 1 and there can only be terms with variables on one side.

The expression given:

x^2-18x

follows these rules. Next, we divide the b (linear coefficient) by 2, then square it. Basically:

(\frac{b}{2})^2

The b in the expression is -18.

(\frac{-18}{2})^2

(-9)^2= -9*-9= 81

This is the number that is added.

You might be interested in
Can someone help me expand this polynomial?
Klio2033 [76]

Answer:

Step-by-step explanation:

(k-p)(k-n)

=k^2 -(p+n)k+pn

this is the expanded form..

please mark me as the brainliest

8 0
3 years ago
Read 2 more answers
It’s supposed to answer in simplest formIf I die is rolled one time find the probability of
Usimov [2.4K]

A die can have 6 possible outcomes.

The probability of an event is calculated using the formula:

P=\frac{number\text{ }of\text{ }required\text{ }outcomes}{number\text{ }of\text{ }total\text{ }outcomes}

Therefore, the probability of rolling a 1 is gotten to be:

P=\frac{1}{6}

The probability is 1/6.

7 0
1 year ago
Imal ikoga iz Bosne?​
soldi70 [24.7K]

Answer:

Da!!!!!!!!!!!!!!!!!!!!!!!!!!

YES

8 0
2 years ago
Read 2 more answers
Solve proportion round it to the nearest hundredth
Sunny_sXe [5.5K]

Answer:

<u>7</u><u>.</u><u>7</u><u> </u><u> </u>= <u>2</u><u>.</u><u>3</u>

3.6 b

<u>7</u><u>.</u><u>7b</u>= <u>8</u><u>.</u><u>28</u>

7.7 7.7

b = 1.075324675

b = 1.08

A) If the last digit in the fractional part of 1.080 is less than 5, then simply remove the last the digit of the fractional part. With 1.080, rule A applies and 1.08 rounded to the nearest hundredth is:

7 0
3 years ago
Question 13 plz show ALL STEPS so I can learn thnx
evablogger [386]

9514 1404 393

Answer:

  a) (x³ -x² +x +2) +2/(x+1)

  b) (x² +2x -5) +6/(x+3)

Step-by-step explanation:

Polynomial long division is virtually identical to numerical long division, except that the quotient term does not require any guessing. It is simply the ratio of the leading terms of the dividend and divisor. As with numerical long division, the product of the quotient term and the divisor is subtracted from the dividend to form the new dividend for the next step.

The process stops when the dividend is of lower degree than the divisor.

In part (a), you need to make sure the dividend expression has all of the powers of x present. This means terms 0x³ and 0x² must be added as placeholders in the given dividend. They will become important as the work progresses.

7 0
3 years ago
Other questions:
  • Type the correct answer in each box.<br><br> The equation of the line in this graph is y = x + .
    5·1 answer
  • Find the y-intercept and x-intercept of the line.
    7·2 answers
  • (x+8)-14=-15 what is the solution to the equation
    5·2 answers
  • The endpoints of DE are D(-4,11) and E(-4,-13). The endpoints of GH are G(-14,5) and H(-9,5). Are DE and GH congruent? Explain.
    6·1 answer
  • What is the solution?
    14·2 answers
  • 1. Solve for the missing side: 3 7​
    13·1 answer
  • Anyone can help me solve this question3a^2b^2-17abxy+10x^y^2 using the Cross multiplication method!?
    11·1 answer
  • 100 students at a college went on a trip.One of these students is chosen at random what is the probability that this student wen
    12·1 answer
  • Please help I domt understand​
    11·1 answer
  • Y = 3x + 15<br> 3x + 3y = 9
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!