$(1$ point$)$

Find the linearization of the function $f(x,y)=\sqrt[\phantom{2}]{98-4x^2-2y^2}$ at the point $(-4,3).$

$L(x,y)=$

$$

Use the linear approximation to estimate the value of $f(-4\mathrm{.}1,3\mathrm{.}1)=$