### Home > CALC > Chapter 1 > Lesson 1.4.4 > Problem 1-189

1-189.

Let

*g*(*x*) = (3*x*− l)^{2}. Homework Help ✎Find

*g*(−5).Find

*g*(*a*+ 1) and simplify.If

*g*(*x*) = 49, find*x.*Find

*g*^{−1}(*x*).

*g*(−5) = 256

Set (3*x* - 1)² equal to 49 and solve for *x*.

Substitute (*a* + 1) for *x*. Simplify.

Let *g*(*x*) = *y*. Solve for *x*. Then switch the *x* and *y*.

Remember the ±.