12.If A=3x^(2)-7 times 8 B=x^(2)+8x-3 and C=-5x^(2)-3x+2 find : (i) A-B-C (ii) A-B+C
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If A=3x^(2)-7 times 8 B=x^(2)+8x-3 and C=-5x^(2)-3x+2 find : (i) A-B-C (ii) A-B
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