fungsi kuadrat y=ax²-5x-3 memotong sumbu x di titik -1/2,0.nilai a adalah?
Matematika
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Pertanyaan
fungsi kuadrat y=ax²-5x-3 memotong sumbu x di titik -1/2,0.nilai a adalah?
1 Jawaban
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1. Jawaban keruasriki
FUNGSI KUADRAT
titik (-1/2 , 0)
=> x = -1/2 ; y = 0
0 = a×(-1/2)^2 - 5×(-1/2) - 3
0 = 1/4 a + 5/2 - 3
0 = 1/4 a + 5/2 - 6/2
0 = 1/4 a - 1/2
-1/4 a = -1/2
a = -1/2 × (-4/1)
a = 4/2
a = 1