Question

2a+b² para a=⅔ b= -½

Answer 1

2 a + b² = 2 * 2 / 3 + ( - 1 / 2 )²

4 / 3 + 1 / 4 = 16 + 3 / 12 = 19 / 12

Answer 2

2·2/3+(-1/2)²=
4/3+1/4=
16/12+3/12=
19/12