因式分解 (7x^2)-6

解答

因式分解

(7 x^{2}) - 6

(7 x + 6) (7 x - 6)

求解步骤

(7 x^{2}) - 6

将

7 x^{2} - 6

改写为

(7 x)^{2} - (6)^{2}

= (7 x)^{2} - (6)^{2}

使用平方差公式:

x^{2} - y^{2} = (x + y) (x - y)

(7 x)^{2} - (6)^{2} = (7 x + 6) (7 x - 6)

= (7 x + 6) (7 x - 6)

f a c t or (5 a + 4) - (5 a + 3)^{'}

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