(1)(y^3)^2+(y^2)^3-2y*y^5 (2)(3x+2)(3x-2)-5x(x-1)-(2x-1)(2x-1)
问题描述:
(1)(y^3)^2+(y^2)^3-2y*y^5 (2)(3x+2)(3x-2)-5x(x-1)-(2x-1)(2x-1)
答
y^3)^2+(y^2)^3-2y*y^5
=y^6+y^6-2y^6
=0
3x+2)(3x-2)-5x(x-1)-(2x-1)(2x-1)
=9x^2-4-5x^2+5x-4x^2+4x-1
=9x-5
答
(1)(y^3)^2+(y^2)^3-2y*y^5
=y^6+y^6-2y^6
=0
(2)(3x+2)(3x-2)-5x(x-1)-(2x-1)(2x-1)
=9x²-4-5x²+5x-(4x²-4x+1)
=4x-5