Question

Xsquare + y square = 25 and x cube + y cube = 91 then x and y = ?

Answer 1

let x = 3, y= 4

as 3.3 + 4.4= 25

and 3.3.3 + 4.4.4= 91

so x= 3, y=4

OR

(X+Y)^2 - 2 XY = 25

( X+ Y)^3 - 3X.XY + 3X Y.Y = 91

MULTIPLY ( X+Y) IN 1 BOTH SIDE

( X+Y)^3 - -2 x.xy - 2 x y.y = 25( x+y)

subtract

Answer 2

X= 3

Y= 4

Then equation

Xsqure +Ysqure = 9+16= 25

Xcube +Ycube = 27+64=91

Hope it helps u.