[(8/3+15/4)(8/3-15/4)+(8/3-15/4)^2]/(15/4-8/3)

问题描述:

[(8/3+15/4)(8/3-15/4)+(8/3-15/4)^2]/(15/4-8/3)

=[(8/3)²-(15/4)²+(15/4)²+(8/3)²-2(8/3)(15/4)]/(15/4-8/3)
=[2(8/3)²-2(8/3)(15/4)]/(15/4-8/3)
=2(8/3)(8/3-15/4))/(15/4-8/3)
=-16/3