$\int \frac{x d x}{\sqrt{25-7 x^{2}}}$ এর মান নিচের কোনটি ?

$-\sqrt{25-7 x^{2}}+c$

$\sqrt{25-7 x^{2}}+c$

$-\frac{1}{7} \sqrt{25-7 x^{2}}+c$

$\frac{1}{7} \sqrt{25-7 x^{2}}+c$