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3 years ago

10

9(2a – b)2 – 4(2a – b) – 13

1 answer:

elena-s [515]3 years ago

3 0

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

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