几道数学题 分解因式(a-3)^2+(3-a) -16x^2y^2+12xy^5-8xz^3 x^4-46x^2+254
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/09/27 19:23:33
几道数学题 分解因式
(a-3)^2+(3-a) -16x^2y^2+12xy^5-8xz^3 x^4-46x^2+25
4x^2-y^2-2y-1 (^2即是平方,^4即是四次方)
非零数A,B满足4A^2+B^2=4AB ,则B/A=
(a-3)^2+(3-a) -16x^2y^2+12xy^5-8xz^3 x^4-46x^2+25
4x^2-y^2-2y-1 (^2即是平方,^4即是四次方)
非零数A,B满足4A^2+B^2=4AB ,则B/A=
(a-3)^2+(3-a)
= (a-3)^2-(a-3)
= (a-3)(a-4)
...
-16x^2y^2+12xy^5-8xz^3
= -4x(4xy^2 - 3y^5 + 2z^3)
...
x^4-46x^2+25
= x^4 - 10x^2 + 25 - 36x^2
= (x^2 - 5)^2 - (6x)^2
= (x^2 + 6x - 5)(x^2 - 6x - 5)
...
4x^2-y^2-2y-1
= 4x^2 - (y+1)^2
= (2x+y+1)(2x-y-1)
...
4A^2+B^2=4AB
4A^2+B^2-4AB = 0
(2A-B)^2 = 0
所以
2A=B
B/A = 2
= (a-3)^2-(a-3)
= (a-3)(a-4)
...
-16x^2y^2+12xy^5-8xz^3
= -4x(4xy^2 - 3y^5 + 2z^3)
...
x^4-46x^2+25
= x^4 - 10x^2 + 25 - 36x^2
= (x^2 - 5)^2 - (6x)^2
= (x^2 + 6x - 5)(x^2 - 6x - 5)
...
4x^2-y^2-2y-1
= 4x^2 - (y+1)^2
= (2x+y+1)(2x-y-1)
...
4A^2+B^2=4AB
4A^2+B^2-4AB = 0
(2A-B)^2 = 0
所以
2A=B
B/A = 2
几道数学题,分解因式.1. 3X²+5XY-2Y²+X+9Y-4 2. X²-2根号2X-
几道分解因式题和化简分解因式1.x^2-3xy+2y^22.x^2-3xy+2y^2-y-13.a^2-6ab+8b^2
分解因式1.2a(x-y)-3b(y-x)2.-x^y-2xy+35y3.a^(x-y)-4b^(x-y)若|a+2|+
分解因式:①a的3次方-2a的2次方-4a+8,②x的2次方+y的2次方+z的2次方-2xy-2yz-2xz
分解因式的3道题目1 分解因式2x²+7xy+2y²-5y-22 分解因式6x²-13xy
分解因式x³y-4xy³ 5x(a+b)-y(b+a)的公因式是 分解因式:3(x-2)-2x(x-
-3a^2(x-2y)^3+12a(2y-x)^4分解因式
分解因式x^2y+x^2y+2xy^2-4xy^3
分解因式-4x^3y+16x^2y^2-16xy^3
分解因式2x^2+4xy+2y^2-5x-5y-3
分解因式4x^2-12xy+9y^2-2x+3y-6
分解因式:x^2+3xy+2y^2+5x+8y+6