Known: a + B = 2A, B = 1. Find the value of a square + b square, (a-b) square

Known: a + B = 2A, B = 1. Find the value of a square + b square, (a-b) square

a+b=2a
a=b
a=b=1
a^2+b^2=1+1=2
(a-b)^2=0*0=0