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smpsmp18

· started a discussion

· 1 Months ago

how you did this computation pls explain (Question: 20253.0 )

how these step you did it pls explain as far as my concert it can be solve like this way
(4X+4) (2)
8(x+1)

But you have explain
(4x+4)(2)
8(x+2)
How you did this

Question:
The difference between the square of two consecutive odd numbers is always divisible by:
Options:
A) 3
B) 6
C) 7
D) 8
E) 5
Solution:
Let the two consecutive odd number be (2x+1) and (2x+3)

According the question, 

(2x+3)2-(2x+1)2

=(2x+3+2x+1)(2x+3-2x-1)

=(4x+4)(2)  [.. (x2-y2)=(x+y)(x-y)]

=8(x+1)

which is always divisible by 8

Komal

· commented

· 1 Months ago

Yet to be approved!

Knowledge Expert

· commented

· 1 Months ago

1 had to be there....we fixed it...
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