What is the value of m in the quadratic equation x

• A. <table><tr><td rowspan="2"> </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>45</center></td></tr><tr><td style="text-align: center;">2</td></tr></table>
• B. 16
• C. <table><tr><td rowspan="2"> </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>21</center></td></tr><tr><td style="text-align: center;">2</td></tr></table>
• D. <table><tr><td rowspan="2"> </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>35</center></td></tr><tr><td style="text-align: center;">2</td></tr></table>