Answer:
5x and -4x
Step-by-step explanation:
Paul wants M₁ and M₂ to have a total that is +x, and a product that is -20x². The values of M₁ and M₂ that will do that are ...
5x and -4x

Let's find the slope (m) :
slope of given line is 5/3
now, let's plug the value of coordinates of a point lying on the line ( for example : (6 , 11) and slope (m) to find the y - intercept (c) :
value of y - intercept (c) = 1, so our equation will be :
Check the picture below, notice those three quadrilaterals, bearing in mind that a square and rhombus both have equal sides all around.