video1.0<iframe src="https://www.loom.com/embed/2b2b08ea8a6e4ab3b9f9e517b90ffb73" frameborder="0" width="1440" height="1080" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>10801440Loomhttps://www.loom.com10801440https://cdn.loom.com/sessions/thumbnails/2b2b08ea8a6e4ab3b9f9e517b90ffb73-00001.jpg189p: If 4x^2 + bx + 9 = 0, where b is a constant, has exactly one solution, what is a possible value of b ?