(3a+1)(2a+3)-6(a-1)(a+2)其中a=-3,
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/06 02:53:06
(3a+1)(2a+3)-6(a-1)(a+2)其中a=-3,
(3a+1)(2a+3)-6(a-1)(a+2)其中a=-3,
(3a+1)(2a+3)-6(a-1)(a+2)其中a=-3,
=6a²+11a+3-6a²-6a+12=5a+15=-15+15=0
(3a+1)(2a+3)-6(a-1)(a+2)
=6a^2+11a+3-6a^2+6a+12
=17a+15
=17*(-3)+15
=-51+15
=-36
(3a+1)(2a+3)-6(a-1)(a+2)
=6a^2+11a+3-6a^2-6a+12
=5a+15
=-15+15
=0
(3a+1)(2a+3)-6(a-1)(a+2)
=6a²+11a+3-6a²-6a+12
=5a+15
当a=-3时,
5a+15=-15+15=0
(3a+1)(2a+3)-6(a-1)(a+2)
=6a²+11a+3-6a²-6a+12
=5a+15
当a=-3时
5a+15=5x(-3)+15= -15+15=0
直接代入就行了 得 0
(通分) a/a^a^a+3a+2 ,a/a^a+2a+1 ,-1/3a+6
a+a+1+a+2+a+3+a+4+a+5+a+6+a+7.+a+2013+a+2014=?
(a 1)(a 2)(a 3)(a
(a+2)(a+1)-a(a-3)
a=-1 求a-2a+3a-4a+5a-6a+...+99a-100a
计算(a+1)(a+2)(a+3)(a-6)
a(a-1)(a-2)(a-3)(a-4)因式分解
a-1/a+2÷a²-2a+1/a²-4×a+3/a²+a-6
【1】a+a=a×a a= [ ]【2】a×a=a÷a a=[ ]【3】a×a=a-a a=[ ] [4]a-a=a+a a=[ ]
计算2a(a-3)^1-6a^2(3-a)-8a(a-3)
2/9-3a,a-1/a^2-9,a/a^2-6a+9通分
(a-a/a+1)/(a*a-2a)*(a+1)/(a*a+3a+2)要详细的计算说明!
化简多项式a-2a+3a-4a+5a-...+99a-100a用下面方法解决 a-(a+b)+(a+2b)-(a+3b)+...-(a+101b)解法1:a-2a+3a-4a+5a-..+99a-100a =(a+3a+5a+..+99a)+(-2a-4a-6a-...-100a)=2500a-2550a=-50a解法2:a-2a+3a-4a+5a-...+99a-100a=(a-2a)+(3a-4a)+(5a-6a)+..
比较a^6+a^4+a^2+1与a^5+a^3+a的大小
幂的计算题1、a×a^2×a^3×a^4×a^52、a+2a+3a+4a+a×a^2×a^3×a^4
已知a^2+a+1=0,求1+a+a^2+a^3+a^4+a^5+a^6+a^7+a^8的值
已知1+a+a^2=0求1+a+a^2+a^3+a^4+a^5+a^6+a^7+a^8的值在线等
求和:1,a+a^2,a^3+a^4+a^5,a^6+a^7+a^8+a^9,···(a不等于0)