早教吧作业答案频道 -->其他-->
计算:(1)x•x3+(-2x2)2+24x6÷(-4x2)(2)(x+3y)(x-3y)-(x-3y)2
题目详情
计算:
(1)x•x3+(-2x2)2+24x6÷(-4x2)
(2)(x+3y)(x-3y)-(x-3y)2
(1)x•x3+(-2x2)2+24x6÷(-4x2)
(2)(x+3y)(x-3y)-(x-3y)2
▼优质解答
答案和解析
(1)x•x3+(-2x2)2+24x6÷(-4x2),
=x4+4x4-6x4,
=-x4.
(2)(x+3y)(x-3y)-(x-3y)2,
=x2-9y2-x2+6xy-9y2,
=6xy-18y2.
=x4+4x4-6x4,
=-x4.
(2)(x+3y)(x-3y)-(x-3y)2,
=x2-9y2-x2+6xy-9y2,
=6xy-18y2.
看了 计算:(1)x•x3+(-2...的网友还看了以下:
(2x^4-4x^3y-x^2y^2)-2(x^4-2x^3y-y^3)+x^2y^2的值,其中x 2020-05-14 …
数学题初二的4(2x+3y)^2-9(2x-3y)^2 (x-y)^4+x(x-y)^3-y(y- 2020-05-16 …
计算:(1)x•x3+(-2x2)2+24x6÷(-4x2)(2)(x+3y)(x-3y)-(x- 2020-05-17 …
一、方程组:2x+y=10,x=2y(2)x-y=3,2x+3y=5下面还有(3)2x=3y-1, 2020-06-06 …
初3数学计算题y=3X2-6X+5y=1/2X2-X+3y=-2X2+20X-49 2020-06-12 …
因为(2x+y,3)和P2(4,x-3y)关于X=3时对称,所以(4,x-3y)到X=3的距离为1 2020-07-21 …
下列函数哪些是二次函数?并写出它们的二次项、一次项、常数项?(1)3y=3(x-1)2+1(2)y 2020-08-01 …
已知4x-3y-6z=0,x+2y-7z=0(xyz≠o)求代数式5x2+2y2-z2/2x2-3y 2020-10-31 …
当x趋向于0,lim[ln(1-2x2)+xf(x)]/x6=3,那么lim[f(x)-2x2]/x 2020-10-31 …
解方程一3x-y+z=4,2x+3y-z=12,x+y+z=6.二3x+5x+5y=3y+4x+4y 2020-11-07 …