因式分解 2x^2+5x+32m^2-m-310y^2-y-37-19x-6x^224m^2+m-8-3x^2+5x+2
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/10/03 09:29:44
因式分解
2x^2+5x+3
2m^2-m-3
10y^2-y-3
7-19x-6x^2
24m^2+m-8
-3x^2+5x+2
1-2x-48x^2
-9s^2+30s-25
2x^2+5x+3
2m^2-m-3
10y^2-y-3
7-19x-6x^2
24m^2+m-8
-3x^2+5x+2
1-2x-48x^2
-9s^2+30s-25
都是十字相乘
2x^2+5x+3
=(2x+3)(x+1)
2m^2-m-3
=(2m-3)(m+1)
10y^2-y-3
=(5y-3)(2y+1)
7-19x-6x^2
=-(6x^2+19x-7)
=-(3x-1)(2x+7)
24m^2+m-8
这个不能分解
-3x^2+5x+2
=-(3x^2-5x-2)
=-(3x+1)(x-2)
1-2x-48x^2
=-(48x^2+2x-1)
=-(8x-1)(6x+1)
-9s^2+30s-25
=-(9s^2-30s+25)
=-(3s-5)^2
2x^2+5x+3
=(2x+3)(x+1)
2m^2-m-3
=(2m-3)(m+1)
10y^2-y-3
=(5y-3)(2y+1)
7-19x-6x^2
=-(6x^2+19x-7)
=-(3x-1)(2x+7)
24m^2+m-8
这个不能分解
-3x^2+5x+2
=-(3x^2-5x-2)
=-(3x+1)(x-2)
1-2x-48x^2
=-(48x^2+2x-1)
=-(8x-1)(6x+1)
-9s^2+30s-25
=-(9s^2-30s+25)
=-(3s-5)^2
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