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#1
N is an integer greater than 1. Use algebra to show that (n^2-1) +(n-1)^2 is always equal to an even number please?
0
4 years ago
#2
(Original post by ra1500)
N is an integer greater than 1. Use algebra to show that (n^2-1) +(n-1)^2 is always equal to an even number please?
Expand the expression fully and use your facts about even numbers to show that the expression is indeed even.
0
4 years ago
#3
(Original post by ra1500)
N is an integer greater than 1. Use algebra to show that (n^2-1) +(n-1)^2 is always equal to an even number please?
Expand the brackets.
0
4 years ago
#4
(Original post by ra1500)
N is an integer greater than 1. Use algebra to show that (n^2-1) +(n-1)^2 is always equal to an even number please?
In fact I would factorise the complete the square...not expand brackets...
1
4 years ago
#5
When you expand the brackets you will find that every term is divisible by 2. Therefore, that expression will always be equal to an even number
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