七年级下册整式的乘除计算题:
(1)3A^2B^3*(-2A^2BC)/5A^3B^3
解,得:
==-1.2ABC
(2)(3X+2)(X-1)-3(X+3)(X-3)
解,得:
==3x^2-x-2-3x^2+27
==2x^2-x+25
(3)[(A+2B)^2-(A-2B)^2]/(2AB)
解,得:
==[(A+2B)-(A-2B)][(A+2B)+(A-2B)]/(2AB)
==(4B)(2A)/(2AB)
==4
七年级下册整式的乘除计算题:
(1)3A^2B^3*(-2A^2BC)/5A^3B^3
解,得:
==-1.2ABC
(2)(3X+2)(X-1)-3(X+3)(X-3)
解,得:
==3x^2-x-2-3x^2+27
==2x^2-x+25
(3)[(A+2B)^2-(A-2B)^2]/(2AB)
解,得:
==[(A+2B)-(A-2B)][(A+2B)+(A-2B)]/(2AB)
==(4B)(2A)/(2AB)
==4