Question

初二数学题，用提公因式方法做，要过程

(1) x^4-x^3y (2)2ab+6b (3)5x^2y+10xy^2-15xy (4)3x(m-n)+2(m-n)
(5)3(x-3)^2-6(3-x) (6)y^2(2x+1)+y(2x+1)^2 (7)a^2b(a-b)+3ab(a-b)
要过程的啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊啊

Answer 1

(1) x^4-x^3y
=x³(x-y)

(2)2ab+6b
=2b(a+3)

(3)5x^2y+10xy^2-15xy
=5xy(x+2y-3)

(4)3x(m-n)+2(m-n)
=(m-n)(3x+2)

(5)3(x-3)^2-6(3-x)
=3(x-3)²+6(x-3)
=3(x-3)(x-1)

(6)y^2(2x+1)+y(2x+1)^2
=y(2x+1)(y+2x+1)

(7)a^2b(a-b)+3ab(a-b)
=ab(a-b)(a+3)

Answer 2

(1)原式=3x(x-y)

Answer 3

你2啊啊啊啊啊啊啊啊啊啊啊啊啊