Mathmatics
posted by Nipunika .
2a+6b3(a+3b) raised to the power of 2
solve with steps

First simplify given expression
2a+6b3(a+3b).... first remove parentheses
=2a+6b3a9b .... group like terms
=2a3a +6b9b .... sum like terms
=a3b
=(a+3b)
Square expression
[(a+3b)]^2 .... ^2 means raise to 2nd power
=(1)^2 (a+3b)^2
=(a+3b)^2 .... use identity (x+y)^2=x^2+2xy+y^2
=a^2+6b+9b^2