# How do you write f(x)= (x+3)^2- 7 in standard form?

Standard form of a quadratic function: $f \left(x\right) = a {x}^{2} + b x + c .$.
$f \left(x\right) = \left({x}^{2} + 6 x + 9\right) - 7 = {x}^{2} + 6 x + 2.$