因式分解数道1.x^2-y^2+6x+92.x^3-x^2+x-13.x^2-2x-y^2+14.1/5ab -1/15ac+3b^2-bc5.18a^2-32b^2-18a+24b6.x^2-25+y^2-2xy
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 03:40:55
![因式分解数道1.x^2-y^2+6x+92.x^3-x^2+x-13.x^2-2x-y^2+14.1/5ab -1/15ac+3b^2-bc5.18a^2-32b^2-18a+24b6.x^2-25+y^2-2xy](/uploads/image/z/1654262-62-2.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E6%95%B0%E9%81%931.x%5E2-y%5E2%2B6x%2B92.x%5E3-x%5E2%2Bx-13.x%5E2-2x-y%5E2%2B14.1%2F5ab+-1%2F15ac%2B3b%5E2-bc5.18a%5E2-32b%5E2-18a%2B24b6.x%5E2-25%2By%5E2-2xy)
因式分解数道1.x^2-y^2+6x+92.x^3-x^2+x-13.x^2-2x-y^2+14.1/5ab -1/15ac+3b^2-bc5.18a^2-32b^2-18a+24b6.x^2-25+y^2-2xy
因式分解数道
1.x^2-y^2+6x+9
2.x^3-x^2+x-1
3.x^2-2x-y^2+1
4.1/5ab -1/15ac+3b^2-bc
5.18a^2-32b^2-18a+24b
6.x^2-25+y^2-2xy
因式分解数道1.x^2-y^2+6x+92.x^3-x^2+x-13.x^2-2x-y^2+14.1/5ab -1/15ac+3b^2-bc5.18a^2-32b^2-18a+24b6.x^2-25+y^2-2xy
1,x^2-y^2+6x+9=(x+3)²-y²=(x+3-y)(x+3+y)
2.x^3-x^2+x-1=x²(x-1)+(x-1)=(x²+1 )(x-1)
3.x^2-2x-y^2+1=(x-1)²-y²=(x-1+y)(x-1-y)
4.1/5ab -1/15ac+3b^2-bc=1/15 a(3b-c)+b(3b-c)=(1/15 a+b)(3b-c)
5.18a^2-32b^2-18a+24b=
6,x^2-25+y^2-2xy=(x-y)²-25=(x-y+5)(x-y-5)
x^2-y^2+6x+9
=x^2-y^2+6x+9
=x(x-y^2+9)
2. x^3-x^2+x-1
x(x-1)
3. x^2-2x-y^2+1
=x(x-y^2+1)
4. ...
全部展开
x^2-y^2+6x+9
=x^2-y^2+6x+9
=x(x-y^2+9)
2. x^3-x^2+x-1
x(x-1)
3. x^2-2x-y^2+1
=x(x-y^2+1)
4. 1/5ab -1/15ac+3b^2-bc
=1/3bc
5. 18a^2-32b^2-18a+24b
=18A-8B
6. x^2-25+y^2-2xy
=5(XY)^2
收起