Question

Problema!!!
Ex 9
Urgent

Answer 1

2,4(5)=(245-24)/90=221/90
0,04×10²=0,04x100=4
(-2)⁻²=1/(-2)²=1/4
√6-5<0      I√6-5I =-(√6-5)=5-√6
  1/(1-√6)=  1(1+√6)/(1-√6)(1+√6)=(1+√6)/(1-6) = - (1+√6)/5

2,4(5)+0,04×10²-(-2)⁻²+I√6-5I+1/(1-√6)=
=221/90+4-1/4+5-√6-(1+√6)/5=
=221/90+9-1/4-√6-(1+√6)/5=
=(442+1620-45-180√6-36-36√6)/180=
=(1981-216√6)/180