September 2018 1 68 Report
Jika α dan β adalah akar-akar persamaan kuadrat ax^2 +bx+c=0, tunjukan bahwa:
a.α^4+β^4=b^4-4ab^2c+2a^2c^2
--------------------------------
a^2

b. (α-β)^2 = b^2-4ac
----------
a^2

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