Show that the curve y= 6x^3 + 5x -3 has no tangent line with slope = 4

[@efraimmukendi7137]

Or you could do 4= 18x^2 + 1 and solve with the quadratic formula (which is impossible becasue the squaroot will have a negative number) and thats why theres no tangent with a slope of 4.

[@laptopuse2689]

Thank you