# Math Help - What kind of a problem is this?

1. ## What kind of a problem is this?

I have the following problem to solve but don't recognise what type of problem this actually is let alone how to solve it:

Determine those values of k for which

| k k | = 0
| 8 4k |

the | are supposed to be continuous lines.

Is this comething to do with eigenvectors/eigenvalues? or maybe complex numbers?

Cheers,

Alex.

2. Given the matrix $\left( {\begin{array}{cc} a & b \\ c & d \\\end{array}} \right)$ then its determinant is $\left| {\begin{array}{cc} a & b \\ c & d \\
\end{array}} \right| = ad - bc$
{"extraction_info": {"found_math": true, "script_math_tex": 0, "script_math_asciimath": 0, "math_annotations": 0, "math_alttext": 0, "mathml": 0, "mathjax_tag": 0, "mathjax_inline_tex": 0, "mathjax_display_tex": 0, "mathjax_asciimath": 0, "img_math": 0, "codecogs_latex": 2, "wp_latex": 0, "mimetex.cgi": 0, "/images/math/codecogs": 0, "mathtex.cgi": 0, "katex": 0, "math-container": 0, "wp-katex-eq": 0, "align": 0, "equation": 0, "x-ck12": 0, "texerror": 0, "math_score": 0.9054996371269226, "perplexity": 689.9108352735363}, "config": {"markdown_headings": true, "markdown_code": true, "boilerplate_config": {"ratio_threshold": 0.18, "absolute_threshold": 10, "end_threshold": 15, "enable": true}, "remove_buttons": true, "remove_image_figures": true, "remove_link_clusters": true, "table_config": {"min_rows": 2, "min_cols": 3, "format": "plain"}, "remove_chinese": true, "remove_edit_buttons": true, "extract_latex": true}, "warc_path": "s3://commoncrawl/crawl-data/CC-MAIN-2015-18/segments/1429246641393.36/warc/CC-MAIN-20150417045721-00172-ip-10-235-10-82.ec2.internal.warc.gz"}