Page 44 - MATRIK SMK KELAS X_NAOMI TRI MADA

a b  1  5 −15 
  =  




 c d  5  20 25 

a b  1 −  3
  =  




 c d   4 5 
diperoleh

a = 1, b = -3, c = 4 dan d = 5

berarti

a + b + c + d = 1 – 3 + 4 + 5 = 7

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