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AX2 + 3x - 4 = 1
A 1kuadrat + 3 x 1 - 4 = 1
A + 3 - 4 = 1
A - 1 = 1
A = 1+1
A = 2
⇒ ax² + 3x - 5 = 0
⇒ a(1)² + 3(1) - 5 = 0
⇒ a + 3 - 5 = 0
⇒ a = 2