展开 (x-4)(asqrt(x-2)+3x-6)

解答

展开

(x - 4) (a x - 2 + 3 x - 6)

3 x^{2} - 18 x + a x x - 2 - 4 a x - 2 + 24

求解步骤

(x - 4) (a x - 2 + 3 x - 6)

打开括号

= x a x - 2 + x \cdot 3 x + x (- 6) - 4 a x - 2 - 4 \cdot 3 x - 4 (- 6)

化简

x a x - 2 + x \cdot 3 x + x (- 6) - 4 a x - 2 - 4 \cdot 3 x - 4 (- 6) : 3 x^{2} - 18 x + a x x - 2 - 4 a x - 2 + 24

= 3 x^{2} - 18 x + a x x - 2 - 4 a x - 2 + 24

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