Question

evaluate expression 5jk - 2k² when j = 3 and k = 7evaluate the expression 5jk - 2k² when j = 3/5 and k= 1

Answer 1

Replace for the given values to evaluate the expression.

`\begin{gathered} j=3 \\ k=7 \\ 5jk-2k^2=5\cdot3\cdot7-2(7)^2=7 \end{gathered}`

The first expression evaluated on the given values is 7.

`\begin{gathered} j=(3)/(5) \\ k=1 \\ 5jk-2k^2=5\cdot(3)/(5)\cdot1-2(1)^2=1 \end{gathered}`

The second expression evaluated on the given values is 1.