(1)4x(a+b)-3x²(a+b);
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/07 04:09:50
(1)4x(a+b)-3x²(a+b);
(2)a(x-2y)-b(2y-x)-c(x-2y);
(3)15a²(x-y)-5a(y-x);
(4)(3x+y)(3x-y)-(x+3y)(y-3x);
(2)a(x-2y)-b(2y-x)-c(x-2y);
(3)15a²(x-y)-5a(y-x);
(4)(3x+y)(3x-y)-(x+3y)(y-3x);
(1)4x(a+b)-3x²(a+b);
=x(a+b)(4-3x)
(2)a(x-2y)-b(2y-x)-c(x-2y);
=a(x-2y)+b(x-2y)-c(x-2y);
=(a+b-c)(x-2y)
(3)15a²(x-y)-5a(y-x);
=15a²(x-y)+5a(x-y)
=5a(x-y)(3a+1)
(4)(3x+y)(3x-y)-(x+3y)(y-3x);
=(3x+y)(3x-y)+(x+3y)(3x-y)
=(3x+y+x+3y)(3x-y)
=(4x+4y)(3x-y)
=4(x+y)(3x-y)
=x(a+b)(4-3x)
(2)a(x-2y)-b(2y-x)-c(x-2y);
=a(x-2y)+b(x-2y)-c(x-2y);
=(a+b-c)(x-2y)
(3)15a²(x-y)-5a(y-x);
=15a²(x-y)+5a(x-y)
=5a(x-y)(3a+1)
(4)(3x+y)(3x-y)-(x+3y)(y-3x);
=(3x+y)(3x-y)+(x+3y)(3x-y)
=(3x+y+x+3y)(3x-y)
=(4x+4y)(3x-y)
=4(x+y)(3x-y)
3a-3b/10ab*25a²b³/a²-b² x²-4y²
x⁴-a²x²-b²x²+a²b²
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