How much is $- a - 2 b - 3 c$ less than $a + 3 b - 5 c ?$

- 2 a - 5 b + 2 c

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2 a + 5 b - 2 c

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2 a + 6 b - 15 c

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2 a - 5 b + 15 c

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Solution

The correct option is B $2 a + 5 b - 2 c$
We have to find how much is $- a - 2 b - 3 c$ less than $a + 3 b - 5 c$
$\Rightarrow$ $(a + 3 b - 5 c) - (- a - 2 b - 3 c)$
$\Rightarrow$ $a + 3 b + - 5 c + a + 2 b + 3 c$
$\Rightarrow$ $2 a + 5 b - 2 c$
$∴$ Required answer is $2 a + 5 b - 2 c$

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