tolong jawab ya pakai cara

a) b² - a²x²
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(ax - b)²

= - (a²x² - b²)
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(ax - b)²

= - (ax - b)²
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(ax - b)²

= - 1 / 1
= - 1

b) (x + 2) / (x² - 4)
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3 / (x - 2)

= (x + 2)(x - 2)
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3 (x² - 4)

= (x² - 4)
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3 (x² - 4)

= ⅓