x-y+的三次方展开式
答:(x-y)^3=x^3-3x^2*y+3x*y^2-y^3
答:1、可以先展开来算 (x-y)³=(x-y)(x-y)²=(x-y)(x²-2xy+y²)=x(x²-2xy+y²)-y(x²-2xy+y²)=x³-2x²y+xy²-x²y+2xy²-y³=x³-3x²y+3xy²-y³ (x+y)...
答:①(x-y)∧3=(x-y)∧2×(x-y)②二项式定理
答:展开后公式是(x-y)^3=x^3-3(x^2)y+3x(y^2)-y^3 (x+y)^3= x^3+3(x^2)y+3x(y^2)+y^3 解:1、(x-y)^3=(x-y)(x-y)(x-y)=(x^2-2xy+y^2)(x-y)=x^3-2(x^2)y+x(y^2)-(x^2)y+2x(y^2)-y^3 =x^3-3(x^2)y+3x(y...
答:(y-x)三次方的展开式结果为:(y-x)³=y³-3y²x+3yx²-x³。展开过程如下:(y-x)³=(y-x)(y-x)(y-x)=(y²-2yx+x²)(y-x)=y³-3y²x+3yx²-x³
答:1、可以先展开来算 (x-y)³=(x-y)(x-y)²=(x-y)(x²-2xy+y²)=x(x²-2xy+y²)-y(x²-2xy+y²)=x³-2x²y+xy²-x²y+2xy²-y³=x³-3x²y+3xy²-y³ (x+y)...
答:三次方公式展开是(A+B)³=A³+3A²B+3AB²+B³,(A-B)³=A³-3A²B+3AB²-B³,A³+B³=(A+B)(A²-AB+B²),A³-B³=(A-B)(A²+AB+B²),A³+B³+C³...
答:(x+y)三次方的展开式是:(x + y)^3 = x^3 + 3x^2y + 3xy^2 + y^3。展开过程如下:立方和公式是有时在数学运算中需要运用的一个公式。该公式的文字表达为:两数和,乘它们的平方和与它们的积的差,等于这两个数的立方和。
答:x^3-y^3=(x-y)(x^2+xy+y^2)
答:(x-y)四次方,公式为:(x-y)^4=x^4-4x^3y+6x^2y^2-4xy^3+y^4。
网友评论:
汝苑17011641594:
(x - y)^3展开后的公式是什么?(x+y)^3呢? -
1761丰贺
: (x-y)³=x³-3x²y+3xy²-y³ (x+y)³=x³+3x²y+3xy²+y³ 1、可以先展开来算 (x-y)³=(x-y)(x-y)²=(x-y)(x²-2xy+y²)=x(x²-2xy+y²)-y(x²-2xy+y²)=x³-2x²y+xy²-x²y+2xy²-y³=x³-3x²y+3xy²-y³ (x+y)³=(x+y)(x²+2xy+y²)=x³+2...
汝苑17011641594:
(x - y)的三次方的公式是多少? -
1761丰贺
: 展开全部 (x-y)³=x³-3x²y+3xy²-y³
汝苑17011641594:
x+y 3次方 公式 -
1761丰贺
: 是的.x^3+y^3=(x+y)(x^2-xy+y^2)x^3-y^3=(x-y)(x^2+xy+y^2)
汝苑17011641594:
(x - y)^3展开后的公式是什么?(x+y)^3呢? -
1761丰贺
:[答案] (x-y)³=x³-3x²y+3xy²-y³ (x+y)³=x³+3x²y+3xy²+y³
汝苑17011641594:
x - y的3次方等于什么 -
1761丰贺
: (x-y)^3 =(x-y)^2*(x-y) =(x^2-2xy+y^2)*(x-y) =x^3-x^2y-2x^2y+2xy^2+xy^2-y^3 =x^3-3x^2y+3xy^2-y^3. 扩展资料 找规律的方法: 1、标出序列号:找规律的题目,通常按照一定的顺序给出一系列量,要求我们根据这些已知的量找出一般规律.找出的规...
汝苑17011641594:
(x - y)的三次方的公式是多少 -
1761丰贺
:[答案] (x-y)³=x³-3x²y+3xy²-y³
汝苑17011641594:
(x+y)的三次方(x - y) - (x+y)(x - y)的三次方 -
1761丰贺
: (x+y)^3(x-y)-(x+y)(x-y)^3 =(x+y)(x-y)[(x+y)^2-(x-y)^2] =(x+y)(x-y)[(x+y)+(x-y)][(x+y)-(x-y)] =4(x+y)(x-y)xy
汝苑17011641594:
(X+Y)^3 展开后是怎样的? -
1761丰贺
: (x+y)³=x³+3x²y+3xy²+y³二项式定理 (a+b)^n=C<n,0>a^n+C<n,1>a^(n-1)•b+C<n,2>a^(n-2)•b^2+...+C<n,r>a^(n-r)•b^r+...+C<n,n>b^n
汝苑17011641594:
(x - y)的三次方是怎样的 -
1761丰贺
:[答案] x^3+y^3-2xy^2-2yx^2
汝苑17011641594:
X+y的3次方是什么 -
1761丰贺
: (x+y)^3=x^3+3x^2y+3xy^2+y^3