e. (2a - c)2 + 2(2a -c) - 8 factorise this
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4a - 2c + 4a - 2c -8
8a -4c -8
4 ( 2a -c - 2)
4 [2(a-1) -c ]
8a -4c -8
4 ( 2a -c - 2)
4 [2(a-1) -c ]
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