化简 (-sqrt(a-x))(sqrt(a+x))

解答

化简

(- a - x) (a + x)

- a - x a + x

求解步骤

(- a - x) (a + x)

使用法则:

(a) = a

(a + x) = a + x

= - a - x a + x

使用法则:

(- a) = - a

(- a - x) = - a - x

= - a - x a + x

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