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= 5x pangkat 2 + 24x - 5
b.) 14x - 49 - 4x pangkat 2 - 14 x
= -49 - 4x kuadrat
= 5×" - × + 25× - 5
= 5×" + 24× - 5
b. (7-2×)(2×-7)
= 14×" + 49 - 4× + 14×
= 14×" + 49 + 10×