Question

跪求，初二数学题上册的，给好评

Answer 1

1. (x+2)(x-2);

2. 5(x+2)(x-2);

3. (3x+5y)(3x-5y);

4. [4(x-y)+3(x+y)][4(x-y)-3(x+y)]

   =(7x-y)(x-7y)

5. a(b+2)(b-2);

6. (x^2+1)(x^2-1)=(x^2+1)(x+1)(x-1);

7. a(a^2-b);

8. x(xy+2)(xy-2);

9. =(x^3+y^3)-(x^2y+y^2x)

   =(x+y)(x^2-xy+y^2)-xy(x+y)

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

Answer 2

（x+4）（x-4）
5(x+4)(x-4)

(3x+5y)(3x-5y)
(4x-4y+3x+3y)(4x-4y-3x+3y)
a(b²-4)

(x²+2)(x²-2)
a(a²-b)
x(x²y²-4)
(x-y)(x+y)(x-y)

我也是初二学生 因式分解什么最可恶了！

Answer 3

(x-2)(x+2)
5(x-2)(x+2)
(3x+5y)(3x-5y)
(7x-y)(x-7y)
a(b-2)(b+2)
x²+1(x+1)(x-1)
a(a²-b)
x(xy+2)(xy-2)
(x+y)(x-y)²

Answer 4

(x+2)(x-2) 5(x+2)(x-2) (3x+5y)(3x-5y) (7x-y)(x-7y) a(b+2)(b-2)
(x²+1)(x+1)(x-1) a(a²-b) x(xy+2)(xy-2) (x+y)(x-y)(x-y)
打这个真的很费劲 望采纳

Answer 5

(x＋2﹚﹙x－2﹚
5﹙x＋2﹚﹙x－2﹚
﹙9x﹚²－﹙5y﹚²＝﹙9x＋5y﹚﹙9x-5y﹚
16﹙x²－2xy＋y²﹚-9﹙x²＋2xy＋y²﹚＝5x²－50xy＋7y²
a﹙b²-4﹚＝a﹙b＋2﹚﹙b-2﹚
﹙x²﹚²-1＝﹙x²＋1﹚﹙x²-1﹚＝﹙x²＋1﹚﹙x＋1﹚﹙x－1﹚
a﹙a²-b﹚
x﹙x²y²-4﹚＝x[﹙xy﹚²-4]＝x﹙xy＋2﹚﹙xy－2﹚
x²﹙x-y﹚－y²﹙x-y﹚＝﹙x＋y﹚﹙x－y﹚²