This is another way to solve it: 2.b = a + b + ab where a, b ER 5.(-2).5 solution 5+(-2)=5+(-2)+5X(-2) = 5-2-10 = 3-10 =-7 (-7).5=- 7+5+(-7) 5 = 7+5 35 =-2-35 =-37 (ii) a. era ate+aera etae = a-a e(1+a)=0 e = 0 Let a' be the inverse of a, then ata' + aa'...
5 years ago