Question

if x-y = 7 and x^3 - y^3 = 133 find x^2 + y^2​

Answer 1

I hope its help u.....✌✌✌✌✌✌✌

Answer 2

◀ HEY ▶

Your Solution ⬇⬇⬇

Given ,

=> X - Y = 7

=> X³ - Y³ =133

⬛ To Find

=> x² + y² = ????

Applying Formula ----

=> (X - Y)³ = X³ - Y³ - 3XY(X-Y)

=> (7)³ = 133 - 3XY(7)

=> 343 -133 = - 21X.Y

=> -210 = 21X.Y

=> X.Y = -10

NOW :-

=> (X - Y)² = X² + Y² -2X.Y

=> 49 = X² + Y² -(-20)

=> X² + Y² => 49 -20

=> X² + Y² = 29

⬛⬛⬛ THANK U ⬛⬛⬛