Question

What is the solution to x^2 + 6x +7

Answer 1

Answer:

D) $\frac{-6\pm\sqrt{8} }{2}$

Step-by-step explanation:

$x^2+6x+7=0$

$x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}$

$x=\frac{-6\pm\sqrt{6^2-4(1)(7)} }{2(1)}$

$x=\frac{-6\pm\sqrt{36-28} }{2}$

$x=\frac{-6\pm\sqrt{8} }{2}$ <-- correct option but not simplified fully

$x=\frac{-6\pm2\sqrt{2}}{2}$

$x=-3\pm\sqrt{2}$