Jawaban:
x1 = 1 + √7
x2 = 1 - √7
Penjelasan dengan langkah-langkah:
x²-2x-6=0
a= 1. b= -2 c= -6
[tex]x1 = \frac{ - b + \sqrt{ {b}^{2} - 4ac } }{2a} \\ = \frac{ - ( - 2) + \sqrt{( - 2) {}^{2} - 4(1)( - 6) } }{2(1)} \\ = \frac{2 + \sqrt{4 - ( - 24)} }{2} \\ = \frac{2 + \sqrt{28} }{2} \\ = \frac{2 + 2 \sqrt{7} }{2} \\ = \frac{2}{2} + \frac{2 \sqrt{7} }{2} \\ = 1 + \sqrt{7} [/tex]
[tex]x2 = 1 - \sqrt{7} [/tex]
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Jawaban:
x1 = 1 + √7
x2 = 1 - √7
Penjelasan dengan langkah-langkah:
x²-2x-6=0
a= 1. b= -2 c= -6
[tex]x1 = \frac{ - b + \sqrt{ {b}^{2} - 4ac } }{2a} \\ = \frac{ - ( - 2) + \sqrt{( - 2) {}^{2} - 4(1)( - 6) } }{2(1)} \\ = \frac{2 + \sqrt{4 - ( - 24)} }{2} \\ = \frac{2 + \sqrt{28} }{2} \\ = \frac{2 + 2 \sqrt{7} }{2} \\ = \frac{2}{2} + \frac{2 \sqrt{7} }{2} \\ = 1 + \sqrt{7} [/tex]
[tex]x2 = 1 - \sqrt{7} [/tex]