Question

any one can solve it? ​

Answer 1

Answer:(a+b)(a+3b)

Step-by-step explanation:

a^2+4ab+3b^2

a^2+(3+1)ab+3b^2

a^2+3ab+ab+3b^2

a(a+3b)+b(a+3b)

(a+b)(a+3b)