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Let 5 | A | , 3 | A | 2 1 = = and 5 | A A | 2 1 = + . The value of ) A 2 A 3 ( ) A 3 A 2 ( 2 1 2 1 − • + is -

1. –112.5
2. –106.5
3. –118.5
4. –99.5

Correct answer: –118.5

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