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Q: Factor: 4x2 – 81y2
A: 4x2 – 81y2 = (2x - 9y)(2x + 9y)
Original conversation
User: Factor: x2 + 3x + 7x + 21

User: Factor: x2 – 1

User: Factor: 4x2 – 81y2

Weegy: 4x2 – 81y2 = (2x - 9y)(2x + 9y)
dennis003|Points 499|

User: Factor: x2 – 11x + 18

Weegy: x2 – 11x + 18 = (x-9)(x-2)

Question
Updated 10/21/2014 11:04:07 AM
Edited by jeifunk [10/21/2014 11:03:05 AM], Edited by jeifunk [10/21/2014 11:03:29 AM], Edited by jeifunk [10/21/2014 11:04:07 AM]
Rating
0
x2 + 3x + 7x + 21 = x^2 + 10x + 21
(x + 3)(x + 7)
Flagged by jeifunk [10/21/2014 9:54:23 AM], Unflagged by jeifunk [10/21/2014 10:53:48 AM], Confirmed by jeifunk [10/21/2014 10:53:49 AM]
0
x2 – 1
(x)(x - 1/x)
Confirmed by jeifunk [10/21/2014 9:53:59 AM]
farrukh-expert, the question was already answered and moderators just need to edit it to make the answer clear.
Deleted by jeifunk [10/21/2014 9:46:55 AM], Undeleted by jeifunk [10/21/2014 9:52:09 AM]
ok fine but the first answer you flagged is not answered correctly, check the question again please.. and answers should be flagged when incorrect, but if they are already answered than there is no need to flag the duplicate correct answers.. one should have deleted them . thanks
farrukh-expert, the first question was answered, and needs to be edit. I flagged it first so you can see and check what I was talking about. You can delete your answer if it is really a duplicate answer.
Factor: x2 + 3x + 7x + 21

Weegy: X2-10x+21 = (x-3)(x-7)9x2-25 = (3x+5)(3x-5)x2+10x+25 = (x+5)2_____It is helpful to know your ... [ Solve the following by Factoring: X^2+7x+10=0 ]

User: Factor: x2 + 3x + 7x + 21

Weegy: B. (3x ? 2)(x + 3). This one is correct. 3x2 + 7x - 6. Source:
eturker|Points 2510|

(There is no correct answer in the whole conversation for this question "Factor: x2 + 3x + 7x + 21". The answer which is correct i have already mentioned but you are saying it as wrong and have flagged that answer, i am rest assure that my answer is correct and its not duplicating any answer in this question because there is not any such answer which is answered correctly for this question)
there is a big difference in minus and plus . are you considering this as a answer ((x-3)(x-7)9x2-25 ) or this ((3x ? 2)(x + 3)).
farrukh-expert, please carefully check conversation with multiple questions. Sometimes the questions are just the same. Moderators will edit out unnecessary notes and repeated question to make the conversation clear.
Deleted by jeifunk [10/21/2014 10:53:32 AM], Undeleted by jeifunk [10/21/2014 10:55:41 AM]
the factors are (x + 3) (x + 7) not (x - 3) (x - 7)
because it will make it as x^2 - 7x - 3x + 21 which will become x^2 - 10x + 21 (see its minus not plus) whole equation goes wrong if its mistakenly involve minus instead of plus
thanks jeifunk for understanding this thing. i was continuously pointing out thing but was unable to make you understand.
I am referring to the first question. You answer is right. My apologies.
User: Factor: x2 + 3x + 7x + 21
Weegy: X2-10x+21 = (x-3)(x-7)

The answer should be positive : X2 + 10x + 21 = (x + 3)(x + 7)
its ok no problem. we are humans and mistakes mostly happens by humans.
Questions asked by the same visitor
Reduce to simplest terms: 30x4y2 18xy3 please show work
Weegy: The simplest form of 3 8/10 is ; convert this mixed fraction to improper fraction ; 38/10 ; factor both numerator and denominator; 2(19) / 2(5) ; by elimination ; 19/5 ; therefore the lowest simplest form is 3 4/5. User: Translate into a matimatical sentence: ‘ five less than twice a number’ Weegy: Five less than twice a number is 2n - 5. User: The width of a rectangle is x inches. The length of that rectangle is 4 inches less than three times the width. If the perimeter is 40 inches, what is the length and width of this rectangle? Show all of the work using algebra. Weegy: P=2L + 2W 40=2(8) + 2(12 the L=16 and the W= 24 hope it will help you User: Find three consecutive even numbers whose sum is 42. Show all your work using algebra. User: True or false 5x2 =(5x)2 Weegy: 8x (More)
Question
Updated 4/1/2014 9:28:38 PM
5x^2 =(5x)^2 This is FALSE.
(5x)^2 = 25x^2
Confirmed by jeifunk [4/1/2014 9:28:45 PM]
Multiply: (x + 3)(x2 + 5x – 4)
Question
Updated 56 days ago|4/27/2018 12:29:48 AM
(x + 3)(x^2 + 5x – 4)
= x^3 + 5x^2 - 4x + 3x^2 + 15x - 12
= x^3 + 8x^2 + 11x - 12
Added 56 days ago|4/27/2018 12:29:48 AM
Factor: x2 + 3x + 7x + 21 show work please
Question
Updated 7/28/2014 8:10:05 PM
x^2 + 3x + 7x + 21 = x^2 + 10x + 21 = (x + 3)(x + 7)
Confirmed by andrewpallarca [7/29/2014 3:02:41 AM]
Solve by using PEMDAS: 6*3+10/2
Question
Updated 6/2/2014 11:48:43 AM
6*3+10/2;

18 + 5 = 23
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