Calculus Examples

$x^{2} + 9 y^{2} = 81$ , $(27, 3)$

Step 1

Substitute $27$ for $x$ and $3$ for $y$ in $x^{2} + 9 y^{2} = 81$ .

${(27)}^{2} + 9 {(3)}^{2} = 81$

Step 2

The given point does not make the equation true.

Invalid Point