14公式法求解.因式分解①（x²y²)²-4x²y²②5x²-2x+1/5③9(a-b)²+30(a-b)(a+b)+25(a+b)²④(x²-2x)²+2x(x-2)+1⑤2m²n²+8mn+8+x(mn+2)²⑥(a-b)²(3a-2)(2-3a)a²✿✿

14公式法求解.因式分解①（x²y²)²-4x²y²②5x²-2x+1/5③9(a-b)²+30(a-b)(a+b)+25(a+b)²④(x²-2x)²+2x(x-2)+1⑤2m²n²+8mn+8+x(mn+2)²⑥(a-b)²(3a-2)(2-3a)a²✿✿
14公式法求解.
因式分解
①（x²y²)²-4x²y²
②5x²-2x+1/5
③9(a-b)²+30(a-b)(a+b)+25(a+b)²
④(x²-2x)²+2x(x-2)+1
⑤2m²n²+8mn+8+x(mn+2)²
⑥(a-b)²(3a-2)(2-3a)a²
✿✿✿✿✿✿计算✿✿✿✿✿✿
800²-1600×799+799²
✿✿✿✿✿✿✿✿✿✿✿✿✿✿
回答完的给分.

14公式法求解.因式分解①（x²y²)²-4x²y²②5x²-2x+1/5③9(a-b)²+30(a-b)(a+b)+25(a+b)²④(x²-2x)²+2x(x-2)+1⑤2m²n²+8mn+8+x(mn+2)²⑥(a-b)²(3a-2)(2-3a)a²✿✿
①（x²y²)²-4x²y²
=（x²y²-4）x²y²
=(xy+2)(xy-2)x²y²
②5x²-2x+1/5
=(√5x)²-2(√5)/(√5)x+(1/(√5))²
=(√5x-1/(√5))²
③9(a-b)²+30(a-b)(a+b)+25(a+b)²
=(3(a-b)+5(a+b))²
=(8a+2b)²
④(x²-2x)²+2x(x-2)+1
=(x(x-2))²+2x(x-2)+1
=(x(x-2)+1)²
=((x-1)²)²
=~~
⑤2m²n²+8mn+8+x(mn+2)²
=2(m²n²+4mn+4)+x(mn+2)²
=2(mn+2)²+x(mn+2)²
=(2+x)(mn+2)²
⑥(a-b)²(3a-2)(2-3a)a²
=-((a-b)(3a-b)a)²
###
800²-1600×799+799²
=(800-799)²
=1

①=(x²y²-2xy)(x²y²+2xy)[若在实数范围内还可分解为=(xy-根号下(2xy))(xy+根号下(2xy))(x²y²+2xy)]
②=(5x-1)(x-1/5)
③=[3(a-b)+5(a+b)]²=(8a+2b)²
④=(x²-2x+1)²=(x-1)^4...

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①=(x²y²-2xy)(x²y²+2xy)[若在实数范围内还可分解为=(xy-根号下(2xy))(xy+根号下(2xy))(x²y²+2xy)]
②=(5x-1)(x-1/5)
③=[3(a-b)+5(a+b)]²=(8a+2b)²
④=(x²-2x+1)²=(x-1)^4
⑤=2(mn+2)²+x(mn+2)²=(x+2)(mn+2)²
⑥=-(a-b)²(3a-2)²a²=-[a(a-b)(3a-2)]²
计算：原式=(800-799)²=1

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