①16m^-n^4②16(a-b)²-9(a+b)²③x^5y-xy④2012²-2011²⑤429²×2-171²×2⑥1000²/252²-248²⑦(50 과 1/11)&\#178;-(49 와 10/11)&\#178;

①16m^-n^4②16(a-b)²-9(a+b)²③x^5y-xy④2012²-2011²⑤429²×2-171²×2⑥1000²/252²-248²⑦(50 과 1/11)&\#178;-(49 와 10/11)&\#178;

①16m^4-n^4=(4m²+n²)(4m²-n²)=(4m²+n²)(2m+n)(2m-n)②16(a-b)²-9(a+b)²=[4(a-b)]²-[3(a+b)]²=[4(a+b)+3(a-b)][4(a+b)-3(a-b)]=(7a+b)(-a+7b)=-(7a+b)(a-7b)...