25x² + 30x + 9 = 0
a = 25, b = 30, c = 9
Didapat:
[tex]\begin{aligned} \sf x &= \sf \frac{ - b \pm \sqrt{ {b}^{2} - 4ac} }{2a} \\ \sf &= \sf \frac{ - 30 \pm \sqrt{ {30}^{2} - 4(25)(9)} }{2(25)} \\ \sf &= \sf \frac{ - 30 \pm \sqrt{900 - 900} }{50} \\ \sf &= \sf \frac{ - 30 \pm \sqrt{0} }{50} \\ \sf &= \sf \frac{ - 30 \pm 0}{50} \\ \sf &= \sf - \frac{30}{50} \\ \sf x&= \sf - \frac{3}{5} \end{aligned}[/tex]
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25x² + 30x + 9 = 0
a = 25, b = 30, c = 9
Didapat:
[tex]\begin{aligned} \sf x &= \sf \frac{ - b \pm \sqrt{ {b}^{2} - 4ac} }{2a} \\ \sf &= \sf \frac{ - 30 \pm \sqrt{ {30}^{2} - 4(25)(9)} }{2(25)} \\ \sf &= \sf \frac{ - 30 \pm \sqrt{900 - 900} }{50} \\ \sf &= \sf \frac{ - 30 \pm \sqrt{0} }{50} \\ \sf &= \sf \frac{ - 30 \pm 0}{50} \\ \sf &= \sf - \frac{30}{50} \\ \sf x&= \sf - \frac{3}{5} \end{aligned}[/tex]