计算1.（6/5a³x⁴-0.9ax³）÷3/5ax³2.（7x²y³-8x³y²z）÷8x²y²3.4(x+1)²-(2x+5)(2x-5)4.3(y-z)²-(2y+x)(-z+2y)分解因式1.25x²-16y²2.(a-b)(x-y)-(b-a)(x+y)3.a²-4ab+4b²4.4

计算1.（6/5a³x⁴-0.9ax³）÷3/5ax³2.（7x²y³-8x³y²z）÷8x²y²3.4(x+1)²-(2x+5)(2x-5)4.3(y-z)²-(2y+x)(-z+2y)分解因式1.25x²-16y²2.(a-b)(x-y)-(b-a)(x+y)3.a²-4ab+4b²4.4
计算
1.（6/5a³x⁴-0.9ax³）÷3/5ax³
2.（7x²y³-8x³y²z）÷8x²y²
3.4(x+1)²-(2x+5)(2x-5)
4.3(y-z)²-(2y+x)(-z+2y)
分解因式
1.25x²-16y²
2.(a-b)(x-y)-(b-a)(x+y)
3.a²-4ab+4b²
4.4+12(x-y)+9(x-y)²
5.16x⁴-1
6.(2a-b)²+8ab

计算1.（6/5a³x⁴-0.9ax³）÷3/5ax³2.（7x²y³-8x³y²z）÷8x²y²3.4(x+1)²-(2x+5)(2x-5)4.3(y-z)²-(2y+x)(-z+2y)分解因式1.25x²-16y²2.(a-b)(x-y)-(b-a)(x+y)3.a²-4ab+4b²4.4
1、2xa^2-1.5
2.7y/8-xz
3.8x+29
4.3z^2-4yz-y^2+xz-2xy
 

(5x+4y)(5x-4y)

2x(a-b)

(a-2b)^2

[3(x-y)+2]^2

(4x^2+1)(2x+1)(2x-1)

(2a+b)^2