Question

if x/y=z/w then the value of x^3-y^3 is

Answer 1

Answer:

$\huge{\fbox{\fbox{\bigstar{\mathfrak{\red{Answer}}}}}}$

(x/y) = (z/w)

xw = yz

xw - yz = 0

(xw - yz)² = 0

(xw)² + (yz)² = 2xwyz                                .......................................................(1)

Now, (xy + zw)^2 = (xy)² + (wz)² + 2xwyz

(xy + zw)^2 = (xy)² + (wz)² + (xw)² + (yz)² .......................................................(from 1)

                  = (y² + w²) (x² + z²)

Please verify the answer and tell me.

Answer 2

Answer:

Refers to the attachment