基礎代數/指數函式/指數的乘法

示例問題

例1

(c+3)(c-2)-(c+2)(c-3)=

(c²-2c+3c-6)-(c²-3c+2c+6)=

c²-2c+3c-6-c²+3c-2c-6=

答案: 2c-12

例2

3(2s+4)(s-3)-2(s+3)(2s-4)=

(6s+12)(s-3)-(2s+6)(2s-4)=

(6s²-18s+12s-36)-(4s²-8s+12s-24)=

(6s²-6s-36)-(4s²+4s-24)=

6s²-6s-36-4s²-4s+24=

答案: 2s²-10s-12

練習題

使用 ^ 表示乘方

簡單

1

(x+2)(x-4)=

2

x(x+2)+2(x-4)=

3

(3a+4)(2a-2)=

4

4s(s²+s)-4s²(s-1)=

---

中等

5

2(2x²+4)(2x+3)+(2x+5)=

6

5(x+2)(3-4)-2(x+2)=

---

困難

7

(a+2)²-3(a+2)+10-(a+2)²+3a=

8

v(v+1)-v(v+2)+v(v+5)-v(v+4)=

9

(2d+2)(3d-2)-(3d+2)(2d-3)=