Question 75459
12. (2x-14)/ ( 3x^2-21x) 
{{{2(x-7)/(3x(x-7))}}}
{{{2*cross((x-7))/(3x*cross((x-7)))}}}
{{{highlight(2/3x)}}}
:
13. (x^2-1)/(2x^2+x-1)
{{{((x+1)(x-1))/((2x-1)(x+1))}}}
{{{(cross((x+1))(x-1))/((2x-1)*cross((x+1)))}}}
{{{highlight((x-1)/(2x-1))}}}
:
14. (2x^2+12x+18)/(x^2-x-12)
{{{(2(x^2+6x+9))/((x-4)(x+3))}}}
{{{(2(x+3)(x+3))/((x-4)(x+3))}}}
{{{(2(x+3)*cross((x+3)))/((x-4)*cross((x+3)))}}}
{{{highlight(2(x+3)/(x-4))}}}
:
Happy Calculating!!!!