化简.(-3) x 2ab + 5ab x 6
(1)(-ab+2)(5ab-3)-ab(1-ab) (2)(-2x)·(x^2-5x+6)-4x(2x^2-3x+1)
(1)(-ab+2)(5ab-3)-ab(1-ab) (2) (-2x)*(x的2次方-5x+6)-4x(2x的2次方-
因式分解数道1.x^2-y^2+6x+92.x^3-x^2+x-13.x^2-2x-y^2+14.1/5ab -1/15
(1) -t-t-t(2) 9ab-4ab+ab-7ab+5ab(3) -12x+6y-3+10x-2-y(4) 5m-
⑴-t-t-t⑵9ab-4ab+ab-7ab+5ab⑶-12x+6y-3+10x-2-y⑷5m-7n-8p+5n-9m-
因式分解 x^2-5x-6 y^2-x-12 (a+b)^3-(a+b) 6a^2b^2-18ab^2c+12ab^2c
若X^5-3x^4+7x^3-6x^2+2x+9=(x-a)(x-b)(x-c)(x-d)(x-e)则ab+ac+ad+
几道数学题,化简.3a^b-[2ab-2(a^2b+2ab^2)]x(-6x-9)-x(-8x-15)+2X(3-X)7
(1)2(a^2-ab)-2a^2+3ab (2)5(2x-7y)-3(4x-10y) (3)(x+y)-[3x+(-x
求代数式的值,1(1)5x的2次方+4-3x的2次方-58x-2x的2次方-5+6x,其中x=-3(2)3ab-5ab的
3x+5/(x+2)(x+3)=A/(x+2)+B/(X+3),求AB的值
ab-a*1/3b=?3x*5x-3x*2y=?