1.计算:(1)(X-6)•(X-3) (2)(x+1/2)(x-1/3)(3)(3X+2)(X+2) (4)(4y-1)•(y-5)(5)(X-2)(X平方2+4) (6)(x-y)(x平方2+xy+y平方2).2.求值:x平方2(x-1)-x(x平方2+x-x),其中
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1.计算:(1)(X-6)•(X-3)(2)(x+1/2)(x-1/3)(3)(3X+2)(X+2)(4)(4y-1)•(y-5)(5)(X-2)(X平方2+4)(6)(x-y
1.计算:(1)(X-6)•(X-3) (2)(x+1/2)(x-1/3)(3)(3X+2)(X+2) (4)(4y-1)•(y-5)(5)(X-2)(X平方2+4) (6)(x-y)(x平方2+xy+y平方2).2.求值:x平方2(x-1)-x(x平方2+x-x),其中
1.计算:
(1)(X-6)•(X-3) (2)(x+1/2)(x-1/3)
(3)(3X+2)(X+2) (4)(4y-1)•(y-5)
(5)(X-2)(X平方2+4) (6)(x-y)(x平方2+xy+y平方2).
2.求值:
x平方2(x-1)-x(x平方2+x-x),其中x=1/2.
3.计算
(1)(x-3)(x-3)-6(x平方2+x-1)
(2) (2x+1)平方2-(x+3)平方2 —(x-1)平方2 +1.
没了.
1.计算:(1)(X-6)•(X-3) (2)(x+1/2)(x-1/3)(3)(3X+2)(X+2) (4)(4y-1)•(y-5)(5)(X-2)(X平方2+4) (6)(x-y)(x平方2+xy+y平方2).2.求值:x平方2(x-1)-x(x平方2+x-x),其中
1 计算答案:
(1)x^2-9x+18
(2)x^2+1/6x-1/6
(3)3x^2+8x+4
(4)4y^2-21y+5
(5)x^3-2x^2+4x-8
(6)x^3-y^3
2 求值答案:
-1/2
3.计算答案:
(1)-5x^2-12x+15
(2)2x^2-10