计算题:4(X-1)²-9 X²(a-1)+4(1-a)
答案:3 悬赏:50 手机版
解决时间 2021-01-21 19:37
- 提问者网友:未信
- 2021-01-21 11:41
计算题:4(X-1)²-9 X²(a-1)+4(1-a)
最佳答案
- 五星知识达人网友:旧脸谱
- 2021-01-21 12:54
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)追问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)追答采纳我,重新问
=[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)追问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)追答采纳我,重新问
全部回答
- 1楼网友:走死在岁月里
- 2021-01-21 14:00
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!
=[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!
- 2楼网友:酒者煙囻
- 2021-01-21 13:08
4(X-1)²-9 X²(a-1)+4(1-a)
=4x²-8x+4-9ax²+9x²-4a+4
=13x²-9ax²-8x-4a+8
=4x²-8x+4-9ax²+9x²-4a+4
=13x²-9ax²-8x-4a+8
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