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Evaluate x^3- y^2 if x=2 and y=3/4

Sagot :

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]