Answer:
y = 3x -2m; 40m² = xy; x = 40m²/y
40m² = xy
40m² = x(3x -2m)
40m² = 3x² -4m²
40m² +4m² = 3x² -4m² +4m²
44m²/3 = 3x²/3
√(44m²/3) = √x²
x = √(44m²/3)
y = 3x -2m
y = 3{√(44m²/3)} -2m
sorry, can't compute the roots. I hope you could solve the rest.
