Will odd numbers when added always make even numbers
1 answer:
Always. consider 2x which is always even (divisible by 2)
then 2x+1 is the form of all odd numbers.
add 2 of the odd numbers together to get (2x+1)(2y+1) = (4y² +2x +2y) + 1
the part in parentheses is always even can you see why? then adding one again always gives us an odd number.
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(x-(-1+4i))(x-(-1-4i))=((x+1)-4i)((x+1+4i)
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