Question

几道计算题,1、-(-3x10^3)22、-（2ab）^3+3ab·a^2·b^23、(-3a^2)·a^3+(-4a)

Answer 1

1、-(-3x10^3)2

=-[（-3）^2x10^6]

=-9x10^6

2、-（2ab）^3+3ab·a^2·b^2

=-8a^3b^3+3a^3b^3

=-5a^3b^3

3、(-3a^2)·a^3+(-4a)^2·a^7-(5a^3)^3

=-3a^5+16a^2.a^7-125a^9

=-3a^5+16a^9-125a^9

=-3a^5-109a^9