a. {-3, -7}
Penjelasan dengan langkah-langkah:
x² + 10x + 21 = 0
(x + 3)(x + 7) = 0
x + 3 = 0 atau x + 7 = 0
x = -3 x = -7
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a. {-3, -7}
Penjelasan dengan langkah-langkah:
x² + 10x + 21 = 0
(x + 3)(x + 7) = 0
x + 3 = 0 atau x + 7 = 0
x = -3 x = -7