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| 1. |
Fill in the boxes with appropriate terms in the steps of expansion .(3a + 5b -7c)² = ( 3a) ² + ----- + (7c)² + 2 x 3a x ----- ( -70bc ) + -------------- A) 25b² , 5b , -42acB) 5b² , 7b , -42acC) 25b² , 5b , -21ac |
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