Phân tích đa thức thành nhân tử a) A = x . y - x^2 - y^2 + 4 . x + 5
b) B = 19 . x^2 + 54 . y^2 + 16 . z^2 - 16 . x . z -24 .y . z +36 . x . y + 5
c) C = x . y . ( x - 2 ) . ( y + 6 ) + 12 . x^2 - 24 . x + 3 . y^2 + 18 . y + 2016
d) 12.x^4 +3.x^3+x^2-2
e) x^4+3x^3-x^2-4x+2
g) x^4+6x^3+7x^2-6x+1
h)x^9-x^7-x^6-x^5+x^4+x^3+x^2+1
tim a,b,c,d thoa man a^2+b^2+c^2+d^2-ab-bc-cd-d+2/5=0
Tim cap (x,y) thoa man
( x-y+2) . ( x-2) + ( x-y+2) . ( 2-x) =5
bai1.tim x biet:
a,(x+2).(x+3)-(x-2).(x+5)=0
b,(2x+3).(x-4)+(x-5).(x-2)=(3x-5).(x-4)
c,(8x-3).(3x+2)-(4x+7).(x+4)=(2x+1).(5x-1)=33
tim x: a.4/(x^2+2x+1)+3/(x^2+2x+3)=3/2
b.4x/(x^2+4x+5)+7x/(x^2-4x+5)=39/10
a) Tim x: 510 \(⋮\) 25x
b) Tim x,y thuoc N:
(y - 2)(2x - 1) = 35
Tim x biết
a)2x(x-5)-x(3+2x)=26
b)5x(x-1)=x-1
C)2(x+5)-x^2-5x=0
d)(2x-3)^2(x+5)=0
e)3x^3-48x=0
f)x^3+x^2-4x=0
tim x
a, (2x-1)*(x+3)-(x+2)2-x*(x+1)=2
b,(x-5)2-1/4*(x-1)2=0
phân tích các đa thức sau thành nhân tử
a) (x2 +x)2 -2(x2+x) -15
b) 4(x+5)(x+6)(x+10)(x+12)-3x2
c)(x2 +8x +7)(x+3)(x+5)+15
dùng hằng đẳng thức để làm nha. cần gấp, thanks nhìu
a) (x-1)^3+(2-x)(4+2x+x^2)+3x(x+2)=17
b) (x+2)(x^2-2x+4)-x(x^2-2)=15
c) (x-3)^3-(x-3)(x^2+3x+9)+9(x+1)^2=15
d) x(x-5)(x+5)-(x+2)(x^2-2x+4)=3