Jika xy= 2 dan x4y5= 64, maka x+y =

xy = 2
x = 2/y
x^4y^5 = 64
(2/y)^4 y^5 = 64
(2^4/y^4) y^5 = 64
(16 / y^4) y^5 = 64
16 (y^5/y^4) = 64
y^(5-4) = 64/16
y = 4
x = 2/y = 2/4 = 1/2
x + y = 1/2 + 4 = 9/2 = 4½

x^4.y^5 = 64
x^4.y^4.y = 64
(xy)^4.y = 64
(2)^4 y = 64
16y = 64
y = 64/16 = 4

xy = 2
x.4 = 2
x = 2/4 = 1/2

x + y = 4 + 1/2 = 9/2 = 4 1/2 = 4,5