作业帮1.x(x+1)(x+2)(x+3)+1
来源：学生作业帮 编辑：作业帮 分类：数学作业 时间：2024/05/16 14:43:01
1.x(x+1)(x+2)(x+3)+1
2.x³+x²-5x-6
3.z²+3x²-9x-27
4.已知a²+2a-14=0,求(a-3)(a+6)(a+5)(a-4)+20的值
就这些 就算有一个答案也好啊~
2.x³+x²-5x-6
3.z²+3x²-9x-27
4.已知a²+2a-14=0,求(a-3)(a+6)(a+5)(a-4)+20的值
就这些 就算有一个答案也好啊~
1.x(x+1)(x+2)(x+3)+1
=(x²+3x)(x²+3x+2)+1
=(x²+3x)²+2(x²+3x)+1
=(x²+3x+1)²
2.x³+x²-5x-6
=x³+x²-2x-3x-6
=x(x²+x-2)-3(x+2)
=x(x-1)(x+2)-3(x+2)
=(x+2)(x²-x-3)
3.x³+3x²-9x-27
=x²(x+3)-9(x+3)
=(x+3)(x²-9)
=(x+3)²(x-3)
4.已知a²+2a-14=0,求(a-3)(a+6)(a+5)(a-4)+20的值
(a-3)(a+6)(a+5)(a-4)+20
=(a²+2a-15)(a²+2a-24)+20
=(14-15)(14-24)+20
=-1×(-10)+20
=10+20
=30
=(x²+3x)(x²+3x+2)+1
=(x²+3x)²+2(x²+3x)+1
=(x²+3x+1)²
2.x³+x²-5x-6
=x³+x²-2x-3x-6
=x(x²+x-2)-3(x+2)
=x(x-1)(x+2)-3(x+2)
=(x+2)(x²-x-3)
3.x³+3x²-9x-27
=x²(x+3)-9(x+3)
=(x+3)(x²-9)
=(x+3)²(x-3)
4.已知a²+2a-14=0,求(a-3)(a+6)(a+5)(a-4)+20的值
(a-3)(a+6)(a+5)(a-4)+20
=(a²+2a-15)(a²+2a-24)+20
=(14-15)(14-24)+20
=-1×(-10)+20
=10+20
=30
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
1.x(x+1)(x+2)(x+3)+1
1.(x-2)(x+2)-(x+1)(x-3)
1+x+x^2+x^3+.+x^99+x^100
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
1.通分3x/x+1,2x+6/x,x方-9/x-1
1.x/9+x=62.x/x+1 + x+1/2x = 3
x(x+1)^3+x(x+1)^2+x(x+1)+x+1因式分解
x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4)
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)