Câu hỏi của Nam Bảo

Question

a, x3+x2-2xb, x2y2z+xy2z2+x2yz2c, 9x2y2+15x2y-21xy2d, 12xy-4x2y+8xy2

Nguyễn Ngọc Huy Toàn · Accepted Answer

`a)`$x^3+x^2-2x=x\left(x^2+x-2\right)$`b)`$x^2y^2z+xy^2z^2+x^2yz^2=xyz\left(xy+yz+xz\right)$`c)`$9x^2y^2+15x^2y-21xy^2=3xy\left(3xy+5x-7y\right)$`d)`$12xy-4x^2y+8xy^2=4xy\left(3-x+2y\right)$Câu trả lời: `a)`$x^3+x^2-2x=x\left(x^2+x-2\right)$`b)`$x^2y^2z+xy^2z^2+x^2yz^2=xyz\left(xy+yz+xz\right)$`c)`$9x^2y^2+15x^2y-21xy^2=3xy\left(3xy+5x-7y\right)$`d)`$12xy-4x^2y+8xy^2=4xy\left(3-x+2y\right)$

Hquynh · Answer

$a,=x\left(x^2+x-2\right)\ =x\left(x-1\right)\left(x+2\right)\ b,=xyz\left(xy+yz+xz\right)\ c,=3xy\left(3xy+5x-7y\right)\ d,=4xy\left(3-x+2y\right)$Câu trả lời: $a,=x\left(x^2+x-2\right)\ =x\left(x-1\right)\left(x+2\right)\ b,=xyz\left(xy+yz+xz\right)\ c,=3xy\left(3xy+5x-7y\right)\ d,=4xy\left(3-x+2y\right)$

a) 5x – 15y	b) 5x²y² + 15x²y + 30xy²
c) x³ – 2x²y + xy² – 9x	d) x(x² – 1) + 3(x² – 1)
e) x² – 10x + 25	g) x² – 64
h) (x + y)² – (x² – y²)	i) 5x² + 5xy – x – y
k) x² – 25 + y² + 2xy	l) 2xy – x² – y² + 16
m) (x – 2)(x – 3) + (x – 2) - 1	n) 3(x – 1) + 5x( 1 – x)
p) 12y(2x – 5) + 6xy(5 – 2x)	q) ax – 2x – a² + 2a

a) a² – b² – 2a + 1	b) x² – 2x – 4y² – 4y
c) x² + 4x – y² + 4	d) x⁴ – 1
e) x⁴ + x³ + x² + x	g) a² + 2ab + b² – ac - bc

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