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misal
p = x²
maka didapat
p² - 6p + 1
pakai rumus ABC
p1 = ((-b + √(b² -4ac))/2a) atau p2= ((-b - √(b² -4ac))/2a)
6 + 4√2
p1 = ((6 + √(-6)² - 4(1)(1))/(2(1)) atau p2 = ((6 - √(-6)² - 4(1)(1))/(2(1))
p1 = ((6 + 4√2)/2) atau p2 = ((6 - 4√2)/2)
p1 = 3 + 2√2 atau p2 = 3 - 2√2
x² = 3 + 2√2 atau x² = 3 - 2√2
x = √(3 + 2√2) atau x = √(3 - 2√2)
x = √2 + 1 atau x = √2 - 1