\(xy+x+y+1 =x(y+1)+(y+1) =(y+1)(x+1)\)
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\(xy+x+y+1 =x(y+1)+(y+1) =(y+1)(x+1)\)
PTĐTTNT
\(^{x^3-xy^2+x^2y-y^2z}\)
x ³ + y ³ -2(x ² - y ²)
ptđttnt
x .(x-z)-y.(x+z)^3 PTĐTTNT
PTĐTTNT:
`3x^2y-12x^3y^2`
`2x^2(x-y)-4xy(x-y)`
1) Rút gọn : A = ( x-5)(3x+2)-(x+2)2
2) PTĐTTNT : a ) x2 - 3x + 2
b) x2 - 2x + xy - 2y
`m) xz-yz-x^2+2xy-y^2 `
ptđttnt
PTĐTTNT
a, 2x^y - 8x^2y + 8xy
b, 4x + 8xy - 3x-6y
c, xy^2 - 4xy + 4y^2 - 9
d, 2x^2 + 2x - 24
Giúp mình vs nhé !
PTĐTTNT
`x^12+x^2+1`
PTĐTTNT :
9-16(x-1)^2