Question

Which of the following is a solution of x2 + 5x = -2?

Answer 1

If you have choices, plug in the values and see which ones work.
If you don't have choices, use the quadratic formula or complete the square.

Answer 2

5 plus or minus the square root of 33 divided by two.

5 plus or minus the square root of 17 divided by two

negative 5 plus or minus the square root of 33 divided by two.

negative 5 plus or minus the square root of 17 divided by two.

Answer 3

\(x^2 + 5x = -2\\x^2 + 5x+2=0\\a=1, b=5, c=2\)

solve using quadratic formula: \(\LARGE \begin{array}{*{20}c} {x = \frac{{ - b \pm \sqrt {b^2 - 4ac} }}{{2a}}} & \\ \end{array}\)