(1)(4x-3y)^2 (2)(1.5a-2/3b)^2 (3)(25x^3+15^2-20x)÷(-5x) (4)(

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/11 18:24:05

(1)(4x-3y)^2 (2)(1.5a-2/3b)^2 (3)(25x^3+15^2-20x)÷(-5x) (4)(2/5y^3-7y^2+2/3y)÷2/3y
(5)(8a^3b-5a^2b^2)÷4ab (6)(2a)^3×b^4÷12a^3b^2 (7)(6/5a^3x^4-0.9ax^3)÷3/5ax^3
越快越好,

(1)(4x-3y)^2 =(4x)²-2×4x×3y+(3y)²=16x²-24xy+9y²

(2)(1.5a-2/3b)^2=2.25a²-2ab+4b²/9

(3)(25x^3+15x^2-20x)÷(-5x)
=25x^3÷(-5x) +15x^2÷(-5x) -20x ÷(-5x)
=-5x²-3x+4

(4)(2/5y^3-7y^2+2/3y)÷2/3y
=2/5y^3÷2/3y-7y^2÷2/3y+2/3y ÷2/3y
=3y²/5-21y/2+1

(5)(8a^3b-5a^2b^2)÷4ab
=8a^3b÷4ab -5a^2b^2 ÷4ab
=2a²-5ab/4

(6)(2a)^3×b^4÷12a^3b^2
=8a³b^4÷12a³b²
=2b²/3

(7)(6/5a^3x^4-0.9ax^3)÷3/5ax^3
=6/5a^3x^4÷3/5ax^3-0.9ax^3 ÷3/5ax^3
=2a²x-1.5

(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y) (1)(4x-3y)^2 (2)(1.5a-2/3b)^2 (3)(25x^3+15^2-20x)÷(-5x) (4)( 因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)( 已知集合A={（x,y)| (y-3)/ (x-1)=2,x,y∈R},B={（x,y)| 4x+ay=16,x,y∈ a*b=2×a+b 计算x*2x*3x*4x*5x*6x*7x*8x*9x=3039 x= 因式分解 1)9x^4-25y^6 2)4x^2+(x+y)^2+4x(x+y) 3)(a+2b)^2-4ab-13b^ 5a+2b+（3a-2b） -3x-（x+1）+（4x+2） -2/1（x+y）+3/1（x-y）已知集合A={y=x^2-2x-3},B={x|x^2+4x-5 ①3a(5a-2b) ②(x-3y) ×（-6x) ③化简x(x-1)+2x(x+1)-3x(2x-5) 分解因式1.2a(x-y)-3b(y-x)2.-x^y-2xy+35y3.a^(x-y)-4b^(x-y)若|a+2|+ 3x/6x^2z a+b/a^2-b^2 x^2+2x+1/x^2+x 3x-6/x^2-4x+4 x^2-6x+5= A(x-2)(x-3)B(x-6)(x+1)