Question 422964
To simplify a rational expression first factor its terms.

 a){{{ (10*(2b+1))/(10*(3b+1))=(2b+1)/(3b+1)}}}

b) {{{ (x^2-16)/(x^2-8x+16)=((x-4)*(x+4))/((x-4)*(x-4))=(x-4)/(x+4) }}}