Question

用平方差公式计算:(a-b＋c-d)(a＋b＋c＋d)=（）＾2－（）＾2

用平方差公式计算:(a-b＋c-d)(a＋b＋c＋d)=（）＾2－（）＾2

Answer 1

(a-b＋c-d)(a＋b＋c＋d)=(a+c-b-d)(a+c+b+d)=[(a+c)-(b+d)] [(a+c)+(b+d)]=(a+c)^2-(b+d)^2

Answer 2

(a-b＋c-d)(a＋b＋c＋d)=(a+c-b-d)(a+c+b+d)=[(a+c)-(b+d)] [(a+c)+(b+d)]=(a+c)^2-(b+d)^2全文

Answer 3

(a+c)^2-(b+d)^2

Answer 4

(a-b＋c-d)(a＋b＋c＋d)=(a+c-b-d)(a+c+b+d)=[(a+c)-(b+d)] [(a+c)+(b+d)]=(a+c)^2-(b+d)^2
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