(1)分解因式:4a(x-y)-2b(y-x)(2)用简便方法计算:20012-
问题:
(1)分解因式:4a(x-y)-2b(y-x) (2)用简便方法计算:20012-4002+1 (3)已知x2+2x-1=0,求(3x-2)(3x+2)-2x(x-1)-(2x-1)2的值 (4)已知:
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(1)分解因式:4a(x-y)-2b(y-x) (2)用简便方法计算:20012-4002+1 (3)已知x2+2x-1=0,求(3x-2)(3x+2)-2x(x-1)-(2x-1)2的值 (4)已知:
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