А) (-3/4 + 2/3)*(-3/4-2/3)=? Б) -3/4+2/3*(-3/4-2/3)=?

Question

А) (-3/4 + 2/3)*(-3/4-2/3)=?

Б) -3/4+2/3*(-3/4-2/3)=?

Answer 1

А) (-3/4+2/3)(-3/4-2/3)=(-3/4)^2-(2/3)^2=9/16-4/9=23/144

б) -3/4+2/3*(-3/4-2/3)=-3/4-1/2-4/9=-1*25/36