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Question
Question 8
Sum of a−b+ab, b+c−bc and c−a−ac is
a) 2c+ab−ac−bc
b) 2c−ab−ac−bc
c) 2c+ab+ac+bc
d) 2c−ab+ac+bc
Sum of a−b+ab, b+c−bc and c−a−ac is
a) 2c+ab−ac−bc
b) 2c−ab−ac−bc
c) 2c+ab+ac+bc
d) 2c−ab+ac+bc
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Solution
a) 2c+ab−ac−bc
→Required sum = (a−b+ab)+(b+c−bc)+(c−a−ac)=a−b+ab+b+c−bc+c−a−ac [adding the like terms and retaining others]=2c+ab−ac−bc
→Required sum = (a−b+ab)+(b+c−bc)+(c−a−ac)=a−b+ab+b+c−bc+c−a−ac [adding the like terms and retaining others]=2c+ab−ac−bc
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