tolong yaa plisss pake cara no 8 & 9

Mapel : Matematika

8]
Bab : Himpunan
A = { 1, 2, 3, 4, 6, 12 }
B = { 0, 1, 2, 3, 4, 5 }

A ∪ B = { 1, 2, 3, 4, 6, 12 } ∪ { 0, 1, 2, 3, 4, 5 }
A ∪ B = { 0, 1, 2, 3, 4, 5, 6,12 }

9] 
Bab : Fungsi
f(x) = 2x - 3
f(-2b + 4) = 2 (-2b + 4) - 3
f(-2b + 4) = -4b + 8 - 3
f(-2b + 4) = -4b + 5

Soal No. 8
A = {1, 2, 3, 4, 6, 12}
B = {0, 1, 2, 3, 4, 5}

A ∪ B = {0, 1, 2, 3, 4, 5, 6, 12} .....................Jawaban (D)

Soal No. 9
f(x) = 2x - 3

f(-2b + 4) = 2(-2b + 4) - 3
                 = - 4b + 8 - 3
                 = - 4b + 5 ......................Jawaban (C)