Question

Ab - 3aif a = -4 and b = -2

Answer 1

Substitute the given values of a and b into the expression:

`ab-3a`

If a=-4 and b=-2, then:

`ab-3a=(-4)(-2)-3(-4)`

Use the order of operations to simplify the arithmetic expression:

`\begin{gathered} (-4)(-2)-3(-4)=8-3(-4) \\ =8+12 \\ =20 \end{gathered}`

Therefore, the value of ab-3a if a=-4 and b=-2, is:

`20`