### Home > A2C > Chapter 9 > Lesson 9.3.2 > Problem 9-140

9-140.

It shows us that 3 is a double root which means (*x* − 3)^{2} is a factor.

Divide *x*^{3} − *x*^{2} − 7*x* + 3 by *x* − 3.

Use a multiplication rectangle to set it up.

Now use the quadratic formula to solve for *x*.