[tex]3x ^{2} - 10x + 10 \\ \\ a(x - \frac{ - b + \sqrt{ {b}^{2} - 4ac } }{2a})(x - \frac{ - b - \sqrt{ {b}^{2} - 4ac } }{2a} \\ \\ 3(x - \frac{10 + \sqrt{( - 10) ^{2} - 4 \times3 \times 10 } }{2 \times 3})(x - \frac{10 - \sqrt{( - 10) ^{2} - 4 \times 3 \times 10 } }{2 \times 3}) \\ \\ 3(x - \frac{10 + 2 \sqrt{5}i }{6})(x - \frac{10 - 2\sqrt{5} }{6} ) \\ \\ 3(x - \frac{2(5 + \sqrt{5}i) }{6})(x - \frac{10 - 2 \sqrt{5}i }{6}) \\ \\ 3(x - \frac{5 + \sqrt{5}i }{3})(x - \frac{10 - 2 \sqrt{5}i }{6}) \\ \\ 3(x - \frac{5 + \sqrt{5}i }{6})(x - \frac{2(5 - \sqrt{5}i) }{6} \\ \\ 3(x - \frac{5 + \sqrt{5}i }{3})(x - \frac{5 - \sqrt{5}i }{3}) [/tex]
