Jawaban 1731130076 Ahmad Faisol Aamin
jawaban soal 1
a) C.B = 4i + 3j + 2k . 5i + 3j + k
= 0 + 12k + 4j + 15k + 0 + 3i + 10j + 6i + 0
= 6i + 14 j + 27k
A.(C.B) = 3i + 6j + 2k . 6i + 14j + 27k
= 0 + 42k + 81j + 36k + 0 + 162i + 12j + 28i + 0
= 190i + 93j + 78k
b) B.A = 3i + 6j + 2k . 5i + 3j + k
= 0 + 9k + 3j + 30k + 0 + 6i + 10j + 6i + 0
= 12i + 13j + 39k
C.(B.A) = 4i + 3j + 2k . 12i + 13j + 39k
= 0 + 52k + 156j + 36k + 0 + 117i + 24j + 26i + 0
= 143i + 180j + 88k
jawaban soal 2
A.B = 6i + 8j . 7k + 3j - 5i
= 42j +18k - 0 + 56i + 0 - 40k
= 56i + 42j - 22k