Question

If a / b = 3 / 5, then what is the value of. b³ - 2a³ / b³ + 2a³ ? *​

Answer 1

Answer:

71,179

solution

b³-2a³=

b³-2a³=b=5,a=3

b³-2a³=5³-2×3³

=5³=(5×5×5)=125

so,125-2×3³=

125-(2×3³)=

2×3³=2×(3×3×3)=

2×27

54.so,125-54=

71.

b³+2a³

b³+2a³=b=5,a=3

b³+2a³=5³+2×3³

=5³=(5×5×5)=125

so,125+2×3³=

125+(2×3³)=

2×3³= (3×3×3)=27

2×27=54

so,125+54=

179.