Tentukan hp dari pers 2x²+8+7=0

2x² + 8x + 7 = 0

a = 2
b = 8
c = 7

Pakai rumus abc

[tex] x = \frac{-b+-\sqrt{b^2-4ac}}{2a} \\ x = \frac{-8+-\sqrt{8^2-4(2)(7)}}{2(2)} \\ x = \frac{-8+-\sqrt{64-56}}{4} \\ x = \frac{-8+-2\sqrt{2}}{4} \\ x = -2 + \frac{1}{2}\sqrt{2} \\ {atau} \\ x = -2 - \frac{1}{2}\sqrt{2} [/tex]