Sandra graphed the system of equations that can be used to solve x^2-2x^2-11x+12=x^3-13x-12

X^3 - 2x^2 - 11x+ 12 = x^3 - 13x - 12the temptation is to cancel out the x^3 and go from there, in fact moving everything over to the left is a temptation. let's try graphing this just as it is to see what happens, however.i don't know if brainley will let me do this, but the graphs are here. the solutions are at x = - 3 and x = 4. if you need more and have a graphing calculator, we could try that each function has a different 3rd solution  that is different from the other side. we  will ignore that for now we will ignore.

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm