find the sum 2a-7b+9c,-4a+9b-7c,11a+2b-2c.
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Hlo mate ......
Here is ur answer ........
2a - 7b + 9c + (-4a) +9b -7c +11a +2b - 2c
= 2a - 4a + 11a +2b -7b +9b +2b +9c -7c -2c
= a ( 2-4+11 ) + b ( 2-7+9+2) +c (9-7-2 )
= 9a + 6b + 0c
= 9a + 6b
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Here is ur answer ........
2a - 7b + 9c + (-4a) +9b -7c +11a +2b - 2c
= 2a - 4a + 11a +2b -7b +9b +2b +9c -7c -2c
= a ( 2-4+11 ) + b ( 2-7+9+2) +c (9-7-2 )
= 9a + 6b + 0c
= 9a + 6b
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sanvi59:
welcome
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