Algebra Help Please!! Exam Tomorrow
Favorites|Homepage
Subscriptions | sitemap
HOME > Mathematics > Algebra Help Please!! Exam Tomorrow

Algebra Help Please!! Exam Tomorrow

[From: ] [author: ] [Date: 11-06-05] [Hit: ]
Another thing is the second factor is not in proper form,If you didnt see the a^2-b^2 at the beginning, you could square the binomial,Good work!-well 1 is a square but its still different than the difference of two squares because for that the whole equation is being squared after the subtraction........
Hey guys, im having a little bit of trouble with the following question:
1-(2y-3)^2

Basically what im doing is going as follows
[1-(2y-3)][1+(2y-3)]
(4-2y)(2y-2)
2(2-y)(y-1)
But apparently thats wrong, WHY?!?!?

Thanks in advance

-
This was so smart to factor as difference of two squares!
Your only mistake is treating factors like you do when you distribute.
(4-2y)(2y-2)
Factor 2 out of EACH factor
2(2-y)(2)(y-1)
4(2-y)(y-1)
Another thing is the second factor is not in proper form, so we should also factor out -1
So
-4(y-2)(y-1)

If you didn't see the a^2-b^2 at the beginning, you could square the binomial, then combine with the 1 and re-factor
Good work!

-
well 1 is a square but it's still different than the difference of two squares because for that the whole equation is being squared after the subtraction... for example 1^2- 2^2 = -1 but (1-2)^2= 1

so what you want to do is use the difference of two squares one the second part

1- (2y+3) (2y-3)

and then solve this


hope i helped!

-
The way you have it written, only the 2y-3 is squared.

1 - (2y-3)^2
1 - (4y^2 - 12y + 9)
1 - 4y^2 + 12y - 9
-4y^2 + 12y - 8

-
1 - (2y-3)2
1 - (2y-3)(2y-3)
1 - 4y2 - 12y + 9
-4y2 - 12y + 10

That's the right answer, 100%. Haters gonna hate :P

-
Just the last term (2y-3) is squared the way it is written...

1 - 4y^2 - 6y + 9 = 4y^2 - 6y + 10

-
1-(8/y^6)=(y^6-8)/y^6 is O.K.
god bless you.
1
keywords: Tomorrow,Exam,Help,Algebra,Please,Algebra Help Please!! Exam Tomorrow
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .