Jawab:
2x² - 7x + 13 = 0
x1 + x2 = 7/2 dan x1x2 = 13/2
x² - (x1+3 + x1+3)x + (x1+3)(x2+3) = 0
x² - (x1+x2 + 6)x + x1x2 + 3(x1+x2) + 9 = 0
x² - (7/2 + 6)x + 13/2 + 3(7/2) + 9 = 0
x² - (19/2)x + 26 = 0, atau
2x² - 19x + 52 = 0
periksa lagi
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Jawab:
2x² - 7x + 13 = 0
x1 + x2 = 7/2 dan x1x2 = 13/2
x² - (x1+3 + x1+3)x + (x1+3)(x2+3) = 0
x² - (x1+x2 + 6)x + x1x2 + 3(x1+x2) + 9 = 0
x² - (7/2 + 6)x + 13/2 + 3(7/2) + 9 = 0
x² - (19/2)x + 26 = 0, atau
2x² - 19x + 52 = 0
periksa lagi