(3a+b)(a-2b) (x+5)(x-1) (1/2x+2)(4x-1/2) (0.1m-0.2n)(0.3m+0.4n) (x^2+xy+y^2)(x-y)

来源：学生作业帮助网编辑：作业帮时间：2024/04/30 04:05:40

(3a+b)(a-2b) (x+5)(x-1) (1/2x+2)(4x-1/2) (0.1m-0.2n)(0.3m+0.4n) (x^2+xy+y^2)(x-y)
(3a+b)(a-2b) (x+5)(x-1) (1/2x+2)(4x-1/2) (0.1m-0.2n)(0.3m+0.4n) (x^2+xy+y^2)(x-y)

(3a+b)(a-2b) (x+5)(x-1) (1/2x+2)(4x-1/2) (0.1m-0.2n)(0.3m+0.4n) (x^2+xy+y^2)(x-y)
(3a+b)(a-2b)
=3a²-5ab-2b²
(x+5)(x-1)
=x²+4x-5
(1/2x+2)(4x-1/2)
=2x²+31x/4-1
(0.1m-0.2n)(0.3m+0.4n)
=0.03m²-0.02mn-0.08n²
(x^2+xy+y^2)(x-y)
=x³-y³

(3a+b)(a-2b)
=3a^2-5ab-2b^2
(x+5)(x-1)
=x^2+4x-5
(1/2x+2)(4x-1/2)
=2x^2-31/4x-1
(0.1m-0.2n)(0.3m+0.4n)
=0.03m^2-0.02mn-0.08n^2
(x^2+xy+y^2)(x-y)
=x^3-y^3

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