Answer:
Step-by-step explanation:
( a - b)² = ( a +b)² - 4ab
or
( a + b)² - (a-b)² = 4ab
LHS
( a + b)² - (a-b)²
= (a² + 2ab + b²) - (a² - 2ab + b²)
= a² + 2ab + b² - a² + 2ab - b²
= 4ab
RHS proved
(a-b)²= (a+b)^2-4ab
L.H.S=(a-b)^2=a^-2ab+b^2
R.H.S=(a+b)^2-4ab
=a^2+2ab+b^2-4ab
=a^2+b^2 -2ab
=a^2-2ab+b^2
∴L.H.S=R.H.S
