Math, asked by naishasahani, 5 months ago

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

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Answered by Anonymous

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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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