X2 - 12x + 36 = (x - k)2

Find the value of a. the diagram is not to scale. a quadrilateral is drawn. the upper and lower sides are parallel. the interior angle in the upper left corner is labeled a degrees. the angle in the upper right corner is labeled 113 degrees. the angle in the lower right corner is labeled b degrees. the angle in the lower left corner is labeled 36 degrees. a. 36 b. 144 c. 54 d. 126

Pls! does anybody know a shortcut for answering these types of questions in the future?

If the discriminant if a quadratic equation is 4 which statement describes the roots?