有几道因式分解的题不会,麻烦给为看看,1.2a²b(x+y)²(b+c)-6a³b²(x+y)(b+c)²2.32ac²+15cx²-48ax²-10c³3.3x³+7x²-4
来源：学生作业帮助网 编辑：六六作业网 时间：2024/11/27 22:04:49
有几道因式分解的题不会,麻烦给为看看,1.2a²b(x+y)²(b+c)-6a³b²(x+y)(b+c)²2.32ac²+15cx²-48ax²-10c³3.3x³+7x²-4
有几道因式分解的题不会,麻烦给为看看,
1.2a²b(x+y)²(b+c)-6a³b²(x+y)(b+c)²
2.32ac²+15cx²-48ax²-10c³
3.3x³+7x²-4
有几道因式分解的题不会,麻烦给为看看,1.2a²b(x+y)²(b+c)-6a³b²(x+y)(b+c)²2.32ac²+15cx²-48ax²-10c³3.3x³+7x²-4
1.2a²b(x+y)²(b+c)-6a³b²(x+y)(b+c)²
=2*a^2*b*(x+y)*(b+c)[x+y-3ab(b+c)]
=2a^2b(x+y)(b+c)[x+y-3ab^2-3abc]
2.32ac²+15cx²-48ax²-10c³
=(32ac^2-10c^3)+(15cx^2-48ax^2)
=2c^2(16a-5c)+3x^2(5c-16a)
=2c^2(16a-5c)-3x^2(16a-5c)
=(16a-5c)(2c^2-3x^2)
3.3x³+7x²-4
=3x^3+(6x^2+x^2)-4
=(3x^3+6x^2)+(x^2-4)
=3x^2(x+2)+(x+2)(x-2)
=(x+2)(3x^2+x-2)
=(x+2)(x+1)(3x-2)
1.原式=2a²b(x+y)(b+c)<(x+y)-3ab(b+c)>
2.原式=32ac²-10c³+15cx²-48ax²
=2c²(16a-5c)+3(5c-16a)
=(2c²-3)(16a-5c)
3.原式=3x³+3x²+4...
全部展开
1.原式=2a²b(x+y)(b+c)<(x+y)-3ab(b+c)>
2.原式=32ac²-10c³+15cx²-48ax²
=2c²(16a-5c)+3(5c-16a)
=(2c²-3)(16a-5c)
3.原式=3x³+3x²+4x²-4
=3x²(x+1)+4(x²-1)
=3x²(x+1)+4(x+1)(x-1)
=(3x²+4x-4)(x+1)
注：<>为中括号
收起