Tuyển Cộng tác viên Hoc24 nhiệm kì 26 tại đây: https://forms.gle/dK3zGK3LHFrgvTkJ6
\(4x^4+y^4=4x^4+4x^2y^2+y^4-4x^2y^2\)
\(=\left(2x^2+y^2\right)^2-\left(2xy\right)^2\)
\(=\left(2x^2-2xy+y^2\right)\left(2x^2+2xy+y^2\right)\)
I: PTĐTTNT
a) x^4+4x^2-5
b) 5x^3-5x^2y-10x^2+10xy
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
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 !!!
PTĐTTNT: \(x^4+64\)
PTĐTTNT
(x+1)(x+2)(x+3)(x+4) - 24
PTĐTTNT
(x+1)(x+2)(x+3)(x+4) + 1
I : PTĐTTNT
a)A= (x-1)(x+2)(x+7)-16
b) A= \(\left(x^2-x-2\right)^2+\left(x-2\right)^2\)
c) \(81x^4+4\)
d) \(\left(x^2-3\right)^2+16\)
help me
I : PTĐTTNT
a) (2x+1)^2-(x-1)^2
I : Tìm x , y
a) x^2+y^2-2x+4y+5=0
b) 4x^2+y^2-4x-6x+10=0
c) 5x^2-4xy+y^2-4x+4=0
d)2x^2-4xy+4y^2-10x+25=0
help me
