Question 1084713

Factor each completely.

42r^3−49r^2+18r−21
<pre>{{{42r^3 - 49r^2 + 18r - 21}}}
{{{7r^2(6r - 7) + 3(6r - 7)}}}
{{{highlight_green((7r^2 + 3)(6r - 7))}}}