Answer
$x^{2}-\frac{2}{7}x-\frac{3}{49}$
Work Step by Step
$(x+\frac{1}{7})(x-\frac{3}{7})=x(x-\frac{3}{7})+\frac{1}{7}(x-\frac{3}{7})=(x)(x)+(x)(-\frac{3}{7})+(\frac{1}{7})(x)+(\frac{1}{7})(-\frac{3}{7})=x^{2}+\frac{1}{7}x-\frac{3}{7}x-\frac{3}{49}=x^{2}-\frac{2}{7}x-\frac{3}{49}$
