Answer
$8$
Work Step by Step
Recall:
$\lim _{x\rightarrow a}p\left( x\right) =p\left( a\right)$
Thus,
$\lim _{x\rightarrow -1}\left( 3x^{2}-5x\right)
\\=3x\left( -1\right) \dfrac {2}{}5\times \left( -1\right)
\\=3-\left( -5\right)
\\=8$
