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mis: akar"nya adalah α dan β , dimana α mewakili x1 dan β mewakili x2
α+β = -b/a
= -10/1
= -10
α×β = c/a
= 5/1
= 5
α/β + β/α = α²+β²
α.β
= (α+β)²-2αβ
α.β
= (-10)²-2(5)
5
= 100-10
5
= 90
5
= 18
jadi x1/x2 + x2/x1 = 18
b=10
c=5
=
=
=
=
=8
semoga bermanfaat :)