Question

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 , -42ac

B)     5b² , 7b , -42ac

C)     25b² , 5b , -21ac
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Answer 1

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