Question

Please answer this question very fast. N0.4 ka answer do.......​

Answer 1

Answer:

4. [x+y]^2-[a+b]^2

x^2+y^2+2xy-[a^2+b^2+2ab]

x^2+y^2+2xy-a^2-b^2-2ab

x^2+y^2-a^2-b^2+2[xy-ab]