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9(2a – b)2 – 4(2a – b) – 13
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9(2a – b)2 – 4(2a – b) – 13

User Mark Jay
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1 Answer

3 votes
18(2a-b)-4(2a-b)-13
=36a-18b-8a+4b-13
Rearrange
=36a-8a-18b+4b-13
=28a-14b-13
User PeteTheGreek
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