Jawaban:
[tex] {x}^{2} + 4x - 21 = 0 \\ (x + 7)(x - 3) = 0 \\ (x + 7) = 0 \: atau \: (x - 3) = 0 \\ x = - 7 \: \: \: \: \: atau \: \: x = 3 \\ [/tex]
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Jawaban:
[tex] {x}^{2} + 4x - 21 = 0 \\ (x + 7)(x - 3) = 0 \\ (x + 7) = 0 \: atau \: (x - 3) = 0 \\ x = - 7 \: \: \: \: \: atau \: \: x = 3 \\ [/tex]