把下列格式分解因式(1)2a^4b62-463b^2+10ab^4;(2)10(x-y)^2-5(x 2020-03-31 …
5.已知x=√5-√2,求x^6-(2√2)x^5-3x^4-x^3+(2√5)x^2-4x+√5 2020-04-26 …
一组数据1,3,2,5,x的平均数是3,这组数据的标准差是? 2020-05-16 …
急用!1.2(x-2)-3(4x-1)=9(1-x)2.11x+64-2x=100-9x3.15- 2020-05-17 …
求未知数x20-3/5(15x+1)=182/52x-3=x+12(x-5)=8-x/22(x+8 2020-07-18 …
解方程,明早就要要,5(x-1)=12-(1-x)=-211x+1=5(2x+1)4x-3(20- 2020-07-19 …
大家忙我做10道方程题,10y+2(7y-2)=5(4y+3)+3y3/4[4/3*（1/2x-1/ 2020-10-31 …
1.x^2-5x+32.x^2-2√2-33.3x^2+4xy-y^24.(x^2-2x)^2-7( 2020-11-01 …
不等式证明3实数x、y、z满足x^5+y^5＝2.求证：x+y≤2.思考了两天已想出两种证法：(1) 2020-11-01 …
若x1满足2x+2^x=5,x2满足2x+2log2(x+1)=5,求x1+x2=多少?2X+2^x 2020-11-19 …