Answer:
[tex]\frac{119}{16}[/tex]
Step-by-step explanation:
given the expression
x³ - y²
substitute x = 2 and y = [tex]\frac{3}{4}[/tex] into the expression
= 2³ - ([tex]\frac{3}{4}[/tex] )²
= 8 - [tex]\frac{9}{16}[/tex] ( change 8 into [tex]\frac{1}{16}[/tex] ' s )
= [tex]\frac{128}{16}[/tex] - [tex]\frac{9}{16}[/tex]
= [tex]\frac{128-9}{16}[/tex]
= [tex]\frac{119}{16}[/tex]