jawab:
X2-5X-2 =
a= 1, b= -5, c=-2
X1+X2= -b/a = 5
X1.X2 = c/a = -2
2/X1 + 2/X2 = 2X2 + 2X1/X1.X2
= 2 (X1+X2)/X1.X2
= 2 (5)/-2
= -5
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jawab:
X2-5X-2 =
a= 1, b= -5, c=-2
X1+X2= -b/a = 5
X1.X2 = c/a = -2
2/X1 + 2/X2 = 2X2 + 2X1/X1.X2
= 2 (X1+X2)/X1.X2
= 2 (5)/-2
= -5