Question 869429
2=(2L^-0.5)*20-((4L^0.5)/2)
2 = 40L^-0.5 - 4L^0.5 / 2
multiply both sides of = by 2
4 = 80L^-0.5 - 4L^0.5
divide both sides of = by 4
1 = 20L^-0.5 - L^0.5
1 = 20L^0.5 / L - L^0.5
multiplied 20L^-0.5 by L^0.5/L^0.5
multiply both sides of = by L
L = 20L^0.5 - L^3/2
L^2/2 + L^3/2 = 20L^1/2
divide both sides of = by L^1/2
L^1/2 + L = 20
L = 16