\(f(x)=3{x}^{2}+a\) where \(a\) is an integer. \(f(-2)=19\) Find the value of \(a\).\(a=\) ........ - চর্চা

\(f(x)=3{x}^{2}+a\) where \(a\) is an integer. \(f(-2)=19\) Find the value of \(a\).\(a=\) ........ - চর্চা