化简 (sqrt(3)-a)^2

解答

化简

(3 - a)^{2}

3 - 23 a + a^{2}

求解步骤

(3 - a)^{2}

使用完全平方公式:

(a - b)^{2} = a^{2} - 2 ab + b^{2}

(3 - a)^{2} = (3)^{2} - 23 a + a^{2}

= (3)^{2} - 23 a + a^{2}

使用指数法则:

(n a)^{n} = a, n i s o dd or a \geq 0

(3)^{2} = 3

= 3 - 23 a + a^{2}

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