Question

prove that (x-y)(x+y)+(z+x)(z-x)=(z+y)(z-y).​

Answer 1

Step-by-step explanation:

i hope this will help you

Answer 2

Step-by-step explanation:

Lhs=(x-y) (x+y) +(z+x) (z-x)

=x(x-y) - y(x+y) +z(z-x) +x(z-x)

=x^2-y^2+z^2-x^2

=z^2-y^2

=(z+y) (z-y)

=rhs