Chapter 1, Problem 15SGR

To determine

To evaluate: the given expression.

Answer to Problem 15SGR

The value of the given expression is 21.

Explanation of Solution

Given information:

Given expression is,

  $z^2+xy$

And,

  $w=0.2,x=10,y=\frac{1}{2},$ and $z=-4$

Calculation:

Let consider the given expression,

  $z^2+xy$

Now, substitute the value $x,yandz$ , in the above expression,

  $\begin{array}{c}{z}^2+xy={\left(-4\right)}^2+\left(10\right)\times \left(\frac{1}{2}\right)\\ =16+5\\ =21\end{array}$

So, the value of the given expression is 21.