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1 answer:
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Answer:
Explanation:
All the other expressions can be factorized. Let's see why:
1)
This is the sum of the cubes, and this can be factorized as follows:
In this case, a=m and b=1, so we can factorize as
2)
This is the difference between two cubes, and this can be factorized as follows:
In this case, a=m and b=1, so we can factorize as
3)
This is the difference between two square numbers, and it can be factorized as follows
In this case, a=m and b=1, so we can factorize as
It seems the first line has to be
1. AB=CD and AD=CB 1. given
2. AC=AC 2. Reflexivity (things are equal to themselves)
3
ACB 
CAD 3. SSS
4.
1 = 4. Corresponding parts of congruent triangles
5 DC || AB 5. Congruent alternate traversal angles imply parallel lines
1. AB=CD and AD=CB 1. given
2. AC=AC 2. Reflexivity (things are equal to themselves)
3
4.
5 DC || AB 5. Congruent alternate traversal angles imply parallel lines