Question

计算x-5分之1-x的平方-25分之6-10+2x分之x+1

Answer 1

=1/(x-5)-6/(x+5)(x-5)-(x+1)/2(x+5)

=2(x+5)/2(x+5)(x-5)-12/2(x+5)(x-5)-(x+1)(x-5)/2(x+5)(x-5)

=(2x+10-12-x²+4x+5)/2(x²-25）

=(-x²+6x+3)/(2x²-50)

=-(x²-6x-3)/(2x²-50)