Các câu hỏi tương tự
CMR:
a) x^2-7x+16>0 vs moi x thuoc R
b) 3x^2-3x+1>0 vs moi x thuoc R
c) -x^2+3x-5<0 vs moi x thuoc R
d) 3x-2x^2<0 vs moi x thuoc R
cmx^2+2x+5>0 moi x thuoc R
cmx^2+3x+6>moi x thuoc R
tim x de A thuoc Z biet A=x^2-3x+1/x+1 .Moi nguoi giup minh giai bai nay trong trua nay nha
(2x-1)(3x+2)(3-x) rut gon bttim x: 9(x+)2-(3x-2)(3x+2)=10phan tich da thuc thanh nhan tu:x2-4x-5 , x2-25-2xy+y2 , x4+x2+1phep chia da thuc: CMR :
Xem chi tiết
a- a2(a+1)+2a(a+1) chia het cho 6 vs a la so nguyen
b- x2+2x+2>0 vs moi x
a) (13x+39)(√14-√7x) = 0 b) (0,9x+1,54)(1,02-0,3x)=0 c) (x^+2x)-(3x+6)/x+3 = 0 d) (x-2)(x^-3x+5)=(x-2)x^ Giải hộ mình vs ạ
Thanks moi ng trc !
Tinh gia tri bthuc:
a, a^3 + 1+ 3a + 3a^2 vs a = 9
b,x^3 + 3x^2 +3x vs x=19
giải giúp mk vs :
a) 6x^2-5x+3=2x-3x(2-x)
b) 25x^2-9=(5x+3)(2x+1)
c) (3x-4)^2-4(x+1)^2=0
d) 3x^2-7x+4=0
e) 2x-5+3x=3x+6
a. Giai pt : 2x(8x-1)^2(4x-2)=9
b. giai pt : x^2-y^2+2x-4y-10=0 vs x,y thuoc so nguyen duong
cmr vs moi n thuoc N thi n^6-n^2 chia het cho 60
lam giup mink vs