To simplify the expression \(-4(squared + 1) + 3x^2\), we first need to interpret \(squared\) as \(x^2\). Therefore, the expression can be rewritten as:
\[ -4(x^2 + 1) + 3x^2 \]
Next, we distribute \(-4\) to the terms inside the parentheses:
\[ -4x^2 - 4 + 3x^2 \]
Now, we combine like terms (\(-4x^2\) and \(3x^2\)):
\[ (-4x^2 + 3x^2) - 4 = -x^2 - 4 \]
Thus, the simplified expression is:
\[ -x^2 - 4 \]