Question

11. What is the solution of the equation x2 + 8x = 4?*=-4+ 215x=-4 1415x=-40215*--45v2

Answer 1

The equation given,

`x^2+8x=4`

Rearranging,

`x^2+8x-4=0`

Comparing to general form of a quadratic, we have:

`\begin{gathered} a=1 \\ b=8 \\ c=-4 \end{gathered}`

Using the quadratic formula, we can find x.

`\begin{gathered} x=\frac{-b\pm\sqrt[\square]{b^2-4ac}}{2a} \\ x=\frac{-8\pm\sqrt[\square]{(8)^2-4(1)(-4)}}{2(1)} \\ x=\frac{-8\pm\sqrt[\square]{80}}{2} \\ x=\frac{-8\pm4\sqrt[]{5}}{2} \\ x=-4\pm2\sqrt[\square]{5} \end{gathered}`

Answer

First answer choice