Answer:
[tex]\frac{28}{5}[/tex]
Step-by-step explanation:
Substitute a = 1, b = 2 into the expression , that is
3(2) + [tex]\frac{-2}{5}[/tex] (1)³ → 1³ = 1
= 6 - [tex]\frac{2}{5}[/tex]
= [tex]\frac{30}{5}[/tex] - [tex]\frac{2}{5}[/tex]
= [tex]\frac{28}{5}[/tex] ( = 5 [tex]\frac{3}{5}[/tex] = 5.6 )
