What does 4a+(9a+3) equal
im assuming this equation is set equal to 0 because you gave no indication of what it is set to. 4a+1(9a+3)=04a+9a+313a=-3a=-3/13
4a+(9a+3)=04a+9a+3=013a+3=013a=-3a=-3/13a=-0.23