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.原式=2a²b(x+y)(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

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^2-48a...