Exercise30

Evaluate the following expressions.

  1. Evaluate \({-4t^{2}r}\) when \(t=-2\) and \(r=-1\text{.}\) \(\displaystyle{{-4t^{2}r}=}\)

  2. Evaluate \({\left(-4t\right)^{2}r}\) when \(t=-2\) and \(r=-1\text{.}\) \(\displaystyle{{\left(-4t\right)^{2}r}=}\)

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