Đặt A= 25x^2 - 20 + 6 = (5x)^2 - 14
(5x)^2 - 14 >/ -14
A= 14 khi (5x)^2 = 0 hay x=0
MinA = -14 <=> x=0
Đặt A= 25x^2 - 20 + 6 = (5x)^2 - 14
(5x)^2 - 14 >/ -14
A= 14 khi (5x)^2 = 0 hay x=0
MinA = -14 <=> x=0
cứu mk vs
https://hoc24.vn/cau-hoi/giup-mk-bai-nay-vs-a-giai-theo-pp-lap-he-pt-
cua-lop-9-mk-can-loi-giai-chi-tiet-a.7681319128063
Các bạn ơi giúp mk vs gpt x(can cua x+1) -2(can cua x+1)-3x-1=0
giup minh vs......
1.Tim tat ca cac so nguyen n ( lnl <1000) sao cho can(3n^2 +789) la mot scphuong chia het cho 3.
2. Biet rang x la mot so thuc khac 0, tim gtnn cua bieu thuc: Q = ( 2011,2012x^2 -2x +2013,2014)/(2014,2015x^2)
Giup bài này vs ạ : cho a,b,c la cac so thoa man a^2+b^2+c^2=<8 tìm GTNN cua xy+yz+2xz
Cho tam giac ABC co AB = 6 cm, AC = 4,5cm, BC = 7,5cm
a. Chung minh tam giac ABC vuong tai A. Tinh cac goc B, goc C va duong cao AH cua tam giac.
b. Tim tap hop cac diem M sao cho S(ABC) = S(BMC).
Cac ban giup mk vs nha mk dag can gap a.
Cam on mn nha.😝😝
gtnn cua x^2+5x+can x-2013
cho tam giac ABC vuong tai A va cho AB=c BC=a AC =b
tim GTNN cua
M = 8a^2 (1/b^2 +1/c^2) + (b+c)/a +2016
ai giup vs
tìm gtln gtnn cua x(2010+ can 2012-x^2)
Cho tam giac ABC vuong tai C,trong do AC= 0,9m, BC= 1,2. Tinh cac ti so luong giac cua goc B, tu do suy ra cac ti so luong giac cua goc A.
Cac bn giup mk vs nha👍👍