### Home > CCA2 > Chapter 1 > Lesson 1.1.2 > Problem 1-21

1-21.

Given *x* and , complete parts (a) through (f) below. 1-21 HW eTool (Desmos). Homework Help ✎

Calculate

*f*(3).Substitute 3 for each

*x*in.Simplify.

Solve

*f*(*x*) = −5.Substitute −5 for

.Subtract 3 from both sides.

Get the

*x*-term alone.*x*= 12Calculate

*g*(−3).Substitute −3 for each

*x*in.Simplify.

Solve

.Substitute −7 for

*g*(*x*).Solve.

No solution.

Solve

*g*(*x*) = 8.Substitute 8 for

.Solve.

Solve

*g*(*x*) = 9.Substitute 9 for

.Solve.

Remember, there should be 2 solutions.

Use the eTool below to solve for each part.

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