1、 (a^m+b^n)*[(a^(2m)+b^(2n)]*(a^m-b^n)
2个回答

1.(a^m+b^n)*[(a^(2m)+b^(2n)]*(a^m-b^n)

= [(a^(2m)-b^(2n)]*[(a^(2m)+b^(2n)]

= a^(4m)-b^(4n)

2.(x-3y)*(x^2+9y^2)*(x+3y)

= (x^2-9y^2)*(x^2+9y^2)

= x^4 - 81y^4

3.(2x-3y)(2x+3y)-(4x+5y)(4x-5y)

= 4x²-9y²-(16x²-25y²)

=-12x²+16y²

4.x-y=5

5.(5/13)^2005 *(2+3/5)^2006-4^1000*(-1/2)^2004

= (5/13)^2005 * (13/5)^2005*(13/5)-2^2000*(-1/2)^2000*(-1/2)^4

= 13/5 -1/16

= 203/80

6.(-1001)^7*(-0.125)^6*(-2/7)^7*(-4/13)^7*(-1/11)^7

= [-1001*(-1/8)*(-2/7)*(-4/13)*(-1/11)]*(-8)

= 8

7.2007*1003