Question

how to solve (a + 3) square with using formula (a + b) square= a square + b square + 2 ab​

Answer 1

Hello mate.......

$(a + 3) {}^{2} = a {}^{2} + 6a + 9$

hope this helps

Answer 2

Answer:

Since, (a+b)^2=a^2+b^2+2ab

Therefore, (a+3)^2=a^2+3^2+2a×3

=a^2+9+6a

=a^2+6a+9