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jawabannya : b
(14x^ + 42) : 7= 2x^ + 6
caranya:
14x^ : 7 = 2x^
42 : 7 = 6
jawabannya : b
(x-8)(x-8) =
x^ -8x - 8x + 64 =
x^ -16x + 64
jawabannya : a
x^ + 4x - 21 =
(x-3)(x+7)
jawabannya : a
x^ -18x + 81 =
(x-9)(x-9)
jawabannya : d
4x^ - 12x + 5 =
(2x -5)(2x-1)
jawabannya : b
7a + 9b + c -(3a - 4b + 5c) =
7a + 9b + c - 3a + 4b - 5c =
7a - 3a + 9b + 4b + c - 5c =
4a + 13b -4c