1. MATEMATIKARIA

2. SOLUTIONS Remember X 2 + Y 2 = (X+Y) 2 – 2XY X 3 + Y 3 = (X+Y) 3 – 3XY(X+Y)

3. Jawaban Soal 1 a b c L = ½ ab = 270 ab = 540 a + b + c = 90 a + b = 90 - c a 2 + b 2 = c 2  (a + b) 2 - 2 ab = c 2 (90-c) 2 – 2.540 = c 2 8100-180c+c 2 – 1080 = c 2 180c =8100-1080 = 7020 c = 39

6. Soal 5 A – B = 3 (A – B) 3 = 3 3 A 3 – 3AB(A-B) – B 3 = 27 A 3 – 3AB.3 – B 3 = 27 A 3 – 9AB – B 3 = 27