计算题:4(X-1)²-9 X²(a-1)+4(1-a)X(X+Y)(X+Y)-X(X+Y)²其中X+Y=1,XY=二分之一(1-2²分之1)X(1-3²分之1)x.......X(1-9²分之1)X(1-10²分之1)
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![计算题:4(X-1)²-9 X²(a-1)+4(1-a)X(X+Y)(X+Y)-X(X+Y)²其中X+Y=1,XY=二分之一(1-2²分之1)X(1-3²分之1)x.......X(1-9²分之1)X(1-10²分之1)](/uploads/image/z/2451675-3-5.jpg?t=%E8%AE%A1%E7%AE%97%E9%A2%98%EF%BC%9A4%28X-1%29%26%23178%3B-9+X%26%23178%3B%EF%BC%88a-1%EF%BC%89%2B4%EF%BC%881-a%EF%BC%89X%28X%2BY%29%28X%2BY%29-X%28X%2BY%29%26%23178%3B%E5%85%B6%E4%B8%ADX%2BY%3D1%EF%BC%8CXY%3D%E4%BA%8C%E5%88%86%E4%B9%8B%E4%B8%80%281-2%26%23178%3B%E5%88%86%E4%B9%8B1%29X%281-3%26%23178%3B%E5%88%86%E4%B9%8B1%29x.......X%EF%BC%881-9%26%23178%3B%E5%88%86%E4%B9%8B1%EF%BC%89X%EF%BC%881-10%26%23178%3B%E5%88%86%E4%B9%8B1%EF%BC%89)
计算题:4(X-1)²-9 X²(a-1)+4(1-a)X(X+Y)(X+Y)-X(X+Y)²其中X+Y=1,XY=二分之一(1-2²分之1)X(1-3²分之1)x.......X(1-9²分之1)X(1-10²分之1)
计算题:4(X-1)²-9 X²(a-1)+4(1-a)
X(X+Y)(X+Y)-X(X+Y)²
其中X+Y=1,XY=二分之一
(1-2²分之1)X(1-3²分之1)x.......X(1-9²分之1)X(1-10²分之1)
计算题:4(X-1)²-9 X²(a-1)+4(1-a)X(X+Y)(X+Y)-X(X+Y)²其中X+Y=1,XY=二分之一(1-2²分之1)X(1-3²分之1)x.......X(1-9²分之1)X(1-10²分之1)
4(X-1)²-9 X²
=[2(X-1)]²-(3X)²
=(2X-2+3X)(2X-2-3X)
=(5X-2)(-X-2)
=-(5X-2)(X+2)
(a-1)³+4(1-a)
=(a-1)³-4(a-1)
=(a-1)[(a-1)²-4]
=(a-1)(a-1+2)(a-1-2)
=(a-1)(a+1)(a-3)
4(X-1)²-9 X²
=[2(X-1)]²-(3X)²
=(2X-2+3X)(2X-2-3X)
=(5X-2)(-X-2)
=-(5X-2)(X+2)
(a-1)³+4(1-a)
=(a-1)³-4(a-1)
=(a-1)[(a-1)²-4]
=(a-1)(a-1+2)(a-1-2)
=(a-1)(a+1)(a-3) 谢谢,望采纳!
4(X-1)²-9 X²(a-1)+4(1-a)
=4x²-8x+4-9ax²+9x²-4a+4
=13x²-9ax²-8x-4a+8