Question

3. Consider the expression 9+3-22 -1.4. (a) What is the value of the expression? Show your work (b) Show where to place grouping symbols so that the value of the expression is 45. Show how the value of the expression changes to 45. Answer. I

Answer 1

(a)

`\begin{gathered} 9+3\cdot2^2-1\cdot4 \\ =9+3\cdot4-4 \\ =9+12-4 \\ =17 \end{gathered}`

(b) To have 45, we would have;

`\begin{gathered} \\ 45=9+3\cdot(2^2-1)\cdot4 \end{gathered}`