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September 2, 2014

September 2, 2014

Posted by **kathy** on Thursday, February 26, 2009 at 10:05pm.

11*11=121

2. (x+1)(x+2)=x^2+2x+x+2=x^2+3x+3

11*12=132

3. (x+1)(x+3)=x^2+3x+x+3=x^2+4x+3

11*13=143

What are the similarities between the two answers in each pair of products?

- Math -
**Reiny**, Thursday, February 26, 2009 at 10:16pmhow about

(2x+1)(2x+3) - 4x^2 + 8x + 3 and

21x23 = 483 WOW!

let's try

(3x+2)(3x+4) = 9x^2 + 18x + 8 and

32x34 = 1088

mmmhhh!

008

180

900

-----

1088

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