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jd x² -({x1 + x2} + x1.x2).x +{ x1+ x2}.x1.x2 = 0
x² -( -3 + 3/2 )x + (-3).3/2=0
x² - (-3/2)x - 9/2 = 0
2x² + 3x - 9= 0
b = 6
c = 3
bentuk umum :
x² - (x1+x2 + x1x2) x + (x1+x2 . x1.x2) = 0
x² - ( -b/a + c/a) x + (-b/a . c/a) = 0
x² - ( -6/2 + 3/2) x + ( -6/2 . 3/2) = 0
x² - (-3/2) x + -9/2 = 0
dikalikan 2
2x² + 3x - 9 = 0 (C)
smoga membantu