摘要:A.x2-3x+2=0 B.2x2=x+4C.(x-1)(x+2)=70 D.x2-11x-10=0
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计算:
①(
m+2)2-(2-
m)(-2-
m)
②(x-3)(x+4)-(x+1)(x-2);
③8x2-(x-2)(3x+1)-2(x+1)(x-5)
④(3x+4)2-(2x+3)(2x-3)
⑤-6xy(x2-2xy-y2)-3xy(2x2-4xy+y2)
⑥(2x-y-1)(2x+y-1) 查看习题详情和答案>>
①(
1 |
2 |
1 |
2 |
1 |
2 |
②(x-3)(x+4)-(x+1)(x-2);
③8x2-(x-2)(3x+1)-2(x+1)(x-5)
④(3x+4)2-(2x+3)(2x-3)
⑤-6xy(x2-2xy-y2)-3xy(2x2-4xy+y2)
⑥(2x-y-1)(2x+y-1) 查看习题详情和答案>>