Question

Factorise by identities
$(a - b) ^{2} + 4ab$
​

Answer 1

Answer:

= (a+b)^2

Step-by-step explanation:

= (a-b)^2+ 4ab

= a^2 -2ab+ b^2+ 4ab

= a^2 + b^2 -2ab + 4ab

= a^2 + b^2 + 2ab

= a^2 + 2ab + b^2

=(a+b)^2