Phan tich thanh nhan tu ( bang ki thuat no sung hang dang thuc)
6x^2-xy-y^2
2x^2+5xy+y^2
6x^2+2xy-4y^2
2x^2+2xy-4y^2
Những câu hỏi liên quan
Phan tich thanh nhan tu ( bang ki thuat no sung hang dang thuc)
6x^2-xy-y^2
2x^2+5xy+y^2
6x^2+2xy-4y^2
2x^2+2xy-4y^2
a/ \(=2xy+6x^2-y^2-3xy=2x\left(y+3x\right)-y\left(y+3x\right)=\left(2x-y\right)\left(y+3x\right)\)
b/ \(=2x^2+5xy+y^2\)
c/ \(=-4y^2+6xy-4xy+6x^2=-2y\left(2y-3x\right)-2x\left(2y-3x\right)=\left(-2y-2x\right)\left(2y-3x\right)=-2\left(y+x\right)\left(2y-3x\right)\)
d/ \(=-4y^2-2xy+4xy+2x^2=-2y\left(2y+x\right)+2x\left(2y+x\right)=\left(-2y+2x\right)\left(2y+x\right)=-2\left(y-x\right)\left(2y+x\right)\)
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Phan tich thanh nhan tu bang ki thuat no sung hang dang thuc.
3x^2+8xy-3y^2
x^2 - x - xy - 2y^2+2y
x^2+2y^2-3xy + x -2y
x^2+x-xy-2y^2+y
Phan tich thanh nhan tu bang ki thuat no sung hang dang thuc.
3x^2+8xy-3y^2
x^2 - x - xy - 2y^2+2y
x^2+2y^2-3xy + x -2y
x^2+x-xy-2y^2+y
Phan tich thanh nhan tu ( bang ki thuat bo sung hang dang thuc )
5x^2 + 14x -3
5x^2 -18x-8
6x^2+7x-3
x^2-xy-2y^2
5x2+14x-3=(5x2+15x)-(x+3)=5x(x+3)-(x+3)=(x+3)(5x-1)
5x2-18x-8=(5x2-20x)+(2x-8)=5x(x-4)+2(x-4)=(x-4)(5x+2)
6x2+7x-3=(6x2-2x)+(9x-3)=2x(3x-1)+3(3x-1)=(3x-1)(2x+3)
x2-xy-2y2=(x2-y2)-(xy+y2)=(x-y)(x+y)-y(x+y)=(x+y)(x-y-y)=(x+y)(x-2y)
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Phan tich thanh nhan tu ( bang ki thuat bo sung hang dang thuc)
x^2+xy-2y^2
x^2-3xy-2y^2
x^2-xy-6y^2
2x^2 - 3xy -2y^2
a/ \(=2xy+x^2-2y^2-xy=x\left(2y+x\right)-y\left(2y+x\right)=\left(x-y\right)\left(2y+x\right)\)
b/ \(=x^2-3xy-2y^2\)
c/ \(=2xy-6y^2+x^2-3xy=2y\left(x-3y\right)+x\left(x-3y\right)=\left(2y+x\right)\left(x-3y\right)\)
d/ \(=xy-2y^2+2x^2-4xy=y\left(x-2y\right)+2x\left(x-2y\right)=\left(y+2x\right)\left(x-2y\right)\)
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a)(x-y)(x+2y)
b) nghiệm lẻ>mìh nghĩ là sai đề
c)(x-3y)(x+2y)
d)(x-2y)(2x+y)
____________________________
li-ke cho mk nha bnLe Ngoc Bao Chau
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Phan tich thanh nhan tu ( bang ki thuat bo sung hang dang thuc)
x^2+xy-2y^2
x^2-3xy-2y^2
x^2-xy-6y^2
2x^2 - 3xy -2y^2
x^2 + xy - 2y^2 = ( x^2 - 2xy + y^2 ) + 3xy - 3y^2 = ( x - y )^2 + 3y.( x - y ) = ( x - y )(x + 2y)
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Phan tich thanh nhan tu ( bang ki thuat bo sung hang dang thuc):
x^2-4xy-x+3y^2+3y
x^2+4xy+2x+3y^2+6y
6x^2+xy-7x-2y^2+7y-5
6a^2-ab-2b^2+a+4b
phan tich da thuc thanh nhan tu
x^2-x-y^2-y
x^2-2xy+y^2-z^2
bai 32 va 33 sbt
lop 8 bai phan tich da thuc thanh nhan tu bang cach nhom hang tu
Ta có
a, x2-x-y2-y
=x2-y2-(x+y)
=(x-y)(x+y) - (x+y)
=(x+y)(x-y-1)
b, x2-2xy+y2-z2
=(x-y)2-z2
=(x-y-z)(x-y+z)
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con bai 32, 33 neu ban tra loi duoc minh h them
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Xem thêm câu trả lời
phan tich thanh nhan tu(bang ki thuat tach hang tu)
1)-8x^2+5x+3
2)-10x^2-17x+6
\(1.-8x^2+5x+3=-8x^2+8x-3x+3=-8x\left(x-1\right)-3\left(x-1\right)=-\left(8x+3\right)\left(x-1\right)\)
\(2.-10x^2-17x+6=-10x^2-20x+3x+6=-10x\left(x+2\right)+3\left(x+2\right)=\left(x+2\right)\left(3-10x\right)\)