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Grade 11Algebra

I have attached my two questions.

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Profile image of Indranil Roy
11 Years agoGrade 11
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1 Answer

Profile image of UPINDERJEET SINGH
11 Years ago
Answer to first question:
x=|a+bw+cw2| + |a+bw2+cw|
x=|a| +x=|a| +|bw|+|cw2|+|a| +|bw2|+|cw​|
x=|a|+|b|×|w|+|c|×|w2|+|a| +|b|×|w2|+|c|×|w​|
x=|a|+|b|×1+|c|×1+|a| +|b|×1+|c|×1          (since |w|, |w2| = 1)
x=2*(|a|+|b|+|c|)
now , 
a, b, c should be integers and be different. 
So, for the sume to be min.
a=0 b=1 c=2
so min.(x) = 6