### Home > CALC > Chapter 7 > Lesson 7.3.3 > Problem 7-133

7-133.

Let *u* = 3*x*². Write a new integrand AND write new bounds.

Remember that the current bounds are *x*-values. They need to be converted to *U*-values.

7-133.

Let *u* = 3*x*². Write a new integrand AND write new bounds.

Remember that the current bounds are *x*-values. They need to be converted to *U*-values.