Question

What is the solution to the following equation?
x2 + 5x + 7 = 0
O A. x = 5:3
O B. x= 33.475
O c. x==37x7
O D. x = -52753

Answer 1

Answer:

None of the answers given.

Step-by-step explanation:

$x^2 + 5x + 7 = 0$

$x=\frac{-5\pm \sqrt{5^2-4\cdot \:1\cdot \:7}}{2\cdot \:1}$

$x=\frac{-5\pm \sqrt{25-28}}{2}$

$x=\frac{-5\pm i\sqrt{3}}{2}$

$x_{1}=-\frac{5}{2}+\frac{\sqrt{3}}{2}i$

$x_{2}=-\frac{5}{2}-\frac{\sqrt{3}}{2}i$