Jawaban:
X1 = 7, X2 = -11
Penjelasan dengan langkah-langkah:
X² + 4x - 77 , a = 1, b = 4, c = -77
Rumus ABC
-b √b² -4ac /2(a)
-4 √4² -4(1)-77 /2(1)
-4 √16 +308 /2
-4 √324 /2 = -4 + 18 /2 atau -4 -18 /2
X1 = -4 + 18 /2
= 14/2
X1 = 7
X2 = -4-18 / 2
= -22/2
X2 = - 11
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Jawaban:
X1 = 7, X2 = -11
Penjelasan dengan langkah-langkah:
X² + 4x - 77 , a = 1, b = 4, c = -77
Rumus ABC
-b √b² -4ac /2(a)
-4 √4² -4(1)-77 /2(1)
-4 √16 +308 /2
-4 √324 /2 = -4 + 18 /2 atau -4 -18 /2
X1 = -4 + 18 /2
= 14/2
X1 = 7
X2 = -4-18 / 2
= -22/2
X2 = - 11