来自马宾的问题
1.计算：(1)(2a+3b)(2a-b)(2)5x^2(x+1)(x-1)(3)(2x+y-1)^22.计算：(1)(2a)^3·b^4÷12a^3b^2(2)(-2/3a^7b^5)÷3/2a^2b^5(3)(6/5a^3x^4-0.9ax^3)÷3/5ax^3(4)(7x^2y^3-8x^3y^2z)÷8x^2y^23.分解因式(1)25x^2-16y^2(2)(a-b)(x-y)-(
1.计算：
(1)(2a+3b)(2a-b)(2)5x^2(x+1)(x-1)(3)(2x+y-1)^2
2.计算：
(1)(2a)^3·b^4÷12a^3b^2(2)(-2/3a^7b^5)÷3/2a^2b^5
(3)(6/5a^3x^4-0.9ax^3)÷3/5ax^3(4)(7x^2y^3-8x^3y^2z)÷8x^2y^2
3.分解因式
(1)25x^2-16y^2(2)(a-b)(x-y)-(b-a)(x+y)
1回答
2020-03-25 01:59