因式分解:①-2xy-x²-y²②x²+2x+1③x²+6x+9④x²-4(x-1)⑤3a²-1ab+12b²⑥(a-b)²+4ab⑦183²+183×34+17²
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![因式分解:①-2xy-x²-y²②x²+2x+1③x²+6x+9④x²-4(x-1)⑤3a²-1ab+12b²⑥(a-b)²+4ab⑦183²+183×34+17²](/uploads/image/z/1999101-21-1.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%EF%BC%9A%E2%91%A0-2xy-x%26%23178%3B-y%26%23178%3B%E2%91%A1x%26%23178%3B%2B2x%2B1%E2%91%A2x%26%23178%3B%2B6x%2B9%E2%91%A3x%26%23178%3B-4%EF%BC%88x-1%EF%BC%89%E2%91%A43a%26%23178%3B-1ab%2B12b%26%23178%3B%E2%91%A5%EF%BC%88a-b%EF%BC%89%26%23178%3B%2B4ab%E2%91%A6183%26%23178%3B%2B183%C3%9734%2B17%26%23178%3B)
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因式分解:①-2xy-x²-y²②x²+2x+1③x²+6x+9④x²-4(x-1)⑤3a²-1ab+12b²⑥(a-b)²+4ab⑦183²+183×34+17²
因式分解:①-2xy-x²-y²②x²+2x+1③x²+6x+9④x²-4(x-1)⑤3a²-1
ab+12b²⑥(a-b)²+4ab⑦183²+183×34+17²
因式分解:①-2xy-x²-y²②x²+2x+1③x²+6x+9④x²-4(x-1)⑤3a²-1ab+12b²⑥(a-b)²+4ab⑦183²+183×34+17²
-(x+y)^2
2.(x+1)^2
(x+3)^2
(x-2)^2
(a+b)^2
(183+17)^2=40000
(a+b)² (183+17)² 不懂可以追问哟~ 望采纳~~~
①-2xy-x²-y²=-(x + y)^2
②x²+2x+1=(x+1)^2
③x²+6x+9=(x+3)^2
④x²-4(x-1)=(-2 + x)^2
⑤3a²-1ab+12b²
⑥(a-b)²+4ab=(a + b)^2
⑦183²+183×34+17²=(183+17)^2=200^2=40000
1、=-(x+y)(x+y)
2\=(x+1)(x+1)
3\=(x+3)(x+3)
4\=(x-2)(x-2)
6 =a*a+b*b+2ab=(a+b)(a+b)
7=(183+17)*(183+17)=200*200=40000
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