Is (–2, 3) a solution to the equation y = –2x2?

1 answer

To determine if the point \((-2, 3)\) is a solution to the equation \(y = -2x^2\), we can substitute \(x = -2\) into the equation and see if it results in \(y = 3\).

Starting with the equation:

\[ y = -2x^2 \]

Substituting \(x = -2\):

\[ y = -2(-2)^2 \]

Calculating \((-2)^2\):

\[ (-2)^2 = 4 \]

Now substituting back into the equation:

\[ y = -2 \cdot 4 = -8 \]

The calculated value of \(y\) is \(-8\). The point \((-2, 3)\) has \(y = 3\), so:

\(-8 \neq 3\)

Thus, \((-2, 3)\) is not a solution to the equation \(y = -2x^2\).