3x^2 + 2x -4 if x = -2
You asked:
Calculate the value of \(3 {x}^{2} + 2 x - 4\) when \(x = -2\).
MathBot Answer:
\[3 {x}^{2} + 2 x - 4 = 4\]
$$\begin{aligned}3 x^{2} + 2 x - 4&=3 \left(-2\right)^{2} + 2 \left(-2\right) - 4\\&=2 \left(-2\right) + 3 \cdot 4 - 4\\&=3 \cdot 4 -4 - 4\\&=4\end{aligned}$$