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# x1 + x2 = -b/a = 2
# x1 x2 = c/a = 3
Rumus = x² - (x1 + x2)x + (x1 x2)
x² - (2x1 + 2x2)x + (2x1 kali 2x2) = 0
x² - 2(x1 + x2)x + (4 x1 x2) = 0
x² - 2(2)x + 4(3) = 0
x² - 4x + 12 = 0
setahu saya