Look at the answer in the first picture first. He moved a new function gx, which is actually -5 on the right of the second question, to the left of the equation. This problem is equivalent to gx being less than k squared-1x. K-square-1x is a straight line with a slope of k-square-1and rotates around the origin. If there is a solution, what should be the relationship between the straight line and the gx diagram (dotted line in the figure)? I believe you can.