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Question
If $$3{a^2} = {b^2} \ne 0{\text{,}}$$   then the value of $$\frac{{{{\left( {a + b} \right)}^3} - {{\left( {a - b} \right)}^3}}}{{{{\left( {a + b} \right)}^2} + {{\left( {a - b} \right)}^2}}}$$    is?
Options:
A .  $$\frac{{3b}}{2}$$
B .  b
C .  $$\frac{b}{2}$$
D .  $$\frac{{2b}}{3}$$
Answer: Option A

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