Question

value of 2ab when a+b whole square equals to (a square+2ab+b square)​

Answer 1

see whatever values of a and b is given multiply them with2 and youmwill get your value

if you ask why 2ab then (a+b)(a+b)

=a²+ab+ba+b2

ab+ab=2ab

that's where from the formula derived as a²+2ab+b²