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1-21.

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

  1. Calculate f(3).

    Substitute 3 for each x in .

    Simplify.

  2. Solve f(x) = −5.

    Substitute −5 for .

    Subtract 3 from both sides.

    Get the x-term alone.

    x = 12

  3. Calculate g(−3).

    Substitute −3 for each x in .

    Simplify.

  4. Solve .

    Substitute −7 for g(x).

    Solve.

    No solution.

  5. Solve g(x) = 8.

    Substitute 8 for .

    Solve.

  6. Solve g(x) = 9.

    Substitute 9 for .

    Solve.

    Remember, there should be 2 solutions.

Use the eTool below to solve for each part.
Click the link at right for the full version of the eTool: CCA2 1-21 HW eTool