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
Agata [3.3K]
3 years ago
5

Complete the square on the following quadratic x^2+18x+7=0 what value is added to both sides of the equation.

Mathematics
1 answer:
Alexandra [31]3 years ago
7 0
X^2 + 18x + 7 = 0
x^2 + 18x = -7
x^2 + 18x + 81 = -7 + 81....add 81 to both sides
(x + 9)^2 = 74
x + 9 = sqrt 74
x = -9 (+-) sqrt 74

x = -9 + sqrt 74
x = -9 - sqrt 74

the reason u add 81 to both sides.....u take half of the x term, then square it.
half of 18 is 9....9^2 = 81
You might be interested in
Simplify the following expression completely using distribution and combining like terms
LiRa [457]

\huge \boxed{\mathbb{QUESTION} \downarrow}

  • Simplify ⇨ 19m + 14 - 3 (3m + 7)

\large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}

\sf \: 19 m - 14 - 3 ( 3 m + 7 )

Use the distributive property to multiply -3 by 3m+7.

\sf \: 19m-14-9m-21

Combine 19m and -9m to get 10m.

\sf \: 10m-14-21

Subtract 21 from -14 to get -35.

\boxed{\boxed{\bf \: 10m-35 }}

5 0
2 years ago
-|2-5| _________ (8-11) compare using < , > or =
Zolol [24]

Here is your answer

=

REASON:

On solving the given two terms

-|2-5|= -|-3|

= -3 (since |-3|=3)

and,

(8-11)

= -3

Hence,

-|2-5| <u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u>=</u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u>(8-11)

HOPE IT IS USEFUL

4 0
2 years ago
In x3, x is called the _____.
Pepsi [2]

Answer:

The variable

Step-by-step explanation:


8 0
2 years ago
Read 2 more answers
Does anyone have an answer or can help
Mamont248 [21]

Answer:

set them equal to each other and solve for x

Step-by-step explanation:

8 0
2 years ago
At a school carnival, the diameter of the mat of a trampoline is 12 feet and the diameter of its metal frame is 14 feet. What is
skelet666 [1.2K]
We don't need to know the trampoline diameter, it's a trick

the legnth of the metal fram is the circumference
C=pid
d=14
c=14pi
pi=3.14
c=14*3.14
c=43.96
round
C=44

answer is 44 feet

4 0
3 years ago
Other questions:
  • .A single card is randomly drawn from a deck of 52 cards. a, Find the probability that it is an ace. b. Find the probability tha
    7·2 answers
  • I need the answer for number 3.
    5·1 answer
  • HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    9·1 answer
  • Is 9.63 &lt; or &gt; than 1.82? And how do you tell
    15·1 answer
  • in the coordinate plain the point located at (-3,4) was reflected and is now located at (3,4). how was the point reflected
    7·1 answer
  • Can Snap say your somewhere when your not with someone????
    5·2 answers
  • What is the answer for this equation
    8·2 answers
  • Help I need to know if each statement is always, sometimes, or never true
    6·2 answers
  • Moooooore memes aaaaaaaaaaa
    13·2 answers
  • Please help! this is for math
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!