Question

Solve x2 - 7x = -13.

Answer 1

\(\large\color{black}{ \displaystyle x^2 - 7x = -13 }\)
\(\large\color{black}{ \displaystyle x^2 - 7x +(7/2)^2= -13 +(7/2)^2}\)
and so forth, ...

(completing the square)

Answer 2

A.
\[x=\frac{ -7\pm i \sqrt{6} }{ 2 }\]
B.
\[x=\frac{ -7\pm i \sqrt{3} }{ 2 }\]
C.
\[x=\frac{ 7\pm i \sqrt{6} }{ 2 }\]
D.
\[x=\frac{ 7\pm i \sqrt{3} }{ 2 }\]

Answer 3

How do I do that?

Answer 4

@SolomonZelman