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Kamis, 13 Oktober 2011

Algebra part 2

B. Perkalian Suku Tunggal

Perhatikan perkalian berikut.

a x 4 = 4 x a =4a
p x 1 = 1 x p = p

Berlaku sifat komutatif.

Dengan cara di atas,maka

p x q = pq
q x p = p x q = pq

Sederhanakan perkalian bentuk aljabar berikut.
a. 6 x k
b. c x (-9)
c. g x (-3)
d. h x 7 x d
e. 7 x (-6r) x 5s
f. -3r x (-5s) x (-6t)

Penyelesaian:
a. 6 x k = 6k
b. c x (-9) = -9 x c =-9c
c. g x (-3) = -3 x g = -3g
d. h x 7 x d = 7 x d x h =7dh
e. 7 x (-6r) x 5s = 7 x (-6) x 5 x r x s =-210rs
f. -3r x (-5s) x (-6t) = -3 x (-5) x (-6) x r x s x t =-90rst.

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