5. What is the second polynomial introduced in the video? a a^wedge 2+14a+49 b a^wedge 2+10a+25 C a^wedge 2+12a+36 d a^wedge 2+8a+16

To determine the correct answer, we need to identify the second polynomial introduced in the video.<br /><br />Based on the options provided, the correct answer is:<br /><br />b) $a^2 + 10a + 25$<br /><br />This polynomial is the second one introduced in the video.