algebra

If c is a constant such that 9x^2 + 12x + c is equal to the square of a binomial, then what is c?

Hello Guest!

                       $9x^2 + 12x + c$

    $(u+v)^2=u^2+2uv+v^2$      first binom

$(3x+2 )^2=9x^2+12x+4$

               $c=4$

  !