Math, asked by naishasahani, 3 months ago

2a - [7b - (-9a ) + (-4c)] is

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Answered by Anonymous
12

Answer ..

 \sf2a - [7b - (-9a ) + (-4c)] \\  \\  \sf = 2a \:  - (7b + 9a - 4c) \\  \\  \sf = 2a - 7b - 9a + 4c \\  \\  \sf = 2a - 9a - 7b + 4c \\  \\  \sf =  - 7a - 7b + 4c

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