Ta có: \(x^4+64\)
\(=\left(x^2\right)^2+2\cdot x^2\cdot8+64-2\cdot x^2\cdot8\)
\(=\left(x^2+8\right)^2-16x^2\)
\(=\left(x^2-4x+8\right)\left(x^2+4x+8\right)\)
PTĐTTNT
(x+1)(x+2)(x+3)(x+4) - 24
PTĐTTNT
(x+1)(x+2)(x+3)(x+4) + 1
I: PTĐTTNT
a) x^4+4x^2-5
b) 5x^3-5x^2y-10x^2+10xy
I : PTĐTTNT
4x^4+y^4
I : PTĐTTNT
A= \(\left(x^2-6x\right)^2-2\left(x-3\right)^2-81\)
B=\(x^4+y^4+z^4-2x^2y^2-2y^2z^2-2x^2z^2\)
help me !!!
I : PTĐTTNT
a) (2x+1)^2-(x-1)^2
ptđttnt
\(x^2\) -5x -3xy + 15y
I : PTĐTTNT
a) \(\left(x^2-x-2\right)^2+\left(x-2\right)^2\)
b) \(x^4+2019x^2+2018x+2019\)
c) \(x^4+2x^3+5x^2+4x-5\)
help me
PTĐTTNT:
x3 + xy2 - 9xz2 - 2xyz
