Exercise 17 Page 252

To evaluate an expression for a specific variable means that we substitute that value into the expression and then simplify according to the order of operations. In this case we substitute

k = 2

into the given expression.

\frac{1}{4} k^{5} - 3 k^{3} + k^{2} - k

Substitute

$k = 2$

\frac{1}{4} (2)^{5} - 3 (2)^{3} + 2^{2} - 2

CalcPow

Calculate power

\frac{1}{4} (32) - 3 (8) + 4 - 2

MoveRightFacToNumOne

$\frac{1}{b} \cdot a = \frac{a}{b}$

\frac{3 2}{4} - 24 + 4 - 2

CalcQuot

Calculate quotient

8 - 24 + 4 - 2

AddSubTerms

Add and subtract terms

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