Question

八年级上册数学计算题求解答

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

Answer 1

1、2xa^2-1.5

2. 7y/8-xz

3. 8x+29

4. 3z^2-4yz-y^2+xz-2xy

 

1. (5x+4y)(5x-4y)

2. 2x(a-b)

3. (a-2b)^2

4. [3(x-y)+2]^2

5. (4x^2+1)(2x+1)(2x-1)

6. (2a+b)^2