Please can i be sincerely helped regarding the answer to this maths problem and the steps thereof

Question

Given: (x-y)(x+y) = 2y(49x-y) ; x>0 and y>0

Prove (x+y)^2 = 100xy

Answer 1

input 1...(x-y)(x+y)=2y(49x-y)...apparentlee teech giv this as gospel

but (x-y)(x+y)=x^2 -y^2=98xy -2y^2...teech giv this as gospel

problem is tu look at (x+y)^2...=x^2 +y^2 +2xy, so it =(x-y)*(x+y)+2xy+2y^2

so it =(98xy-2y^2) +2xy+2y^2

=100xy

######## amazing the lengths teech gotu just tu see if yukan figger it out