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a) L = s x s = (2a) (2a) = 4a²
b) L = p x l = 3a x 3b = 9ab
c) L = (3s x 2s) + (3s x t) = 6s² + 3st
no 3
(2x + 3y) (px + qy) = rx² +23xy + 12y²
2px² + 2qxy + 3pxy + 3qy² = rx² + 23xy + 12y²
2px² + (3p + 2q)xy + 3qy² = rx² + 23xy + 12y²
jadi
12 = 3q
12 : 3 = q
4 = q
lalu
3p + 2q = 23
3p + 2(4) = 23
3p + 8 = 23
23-8= 3p
15 = 3p
5 = p
maka
2p = r
2(5) = r
10 = r