Exercício sobre álgebra elementar

(UFRN) Se $\phantom{X}a\,=\,0,1\phantom{X}$ e $\phantom{X}b\,=\,0,2\phantom{X}$, o valor da expressão $\phantom{X}\dfrac{a^{\large 2}b^{\large 2}\,-\,a^{\large 3}b}{b^{\large 2}\,-\,a^{\large 2}}\phantom{X}$ é:

$\,\dfrac{1}{300}\,$

$\,\dfrac{1}{150}\,$

$\,\dfrac{1}{100}\,$

$\,\dfrac{1}{75}\,$

$\,\dfrac{1}{200}\,$

resposta: (B)
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