Ta có: \(\left(x-3\right)^2+65\)
\(=x^2-6x+9+65\)
\(=x^2-6x+74\)
\(=x\left(x-6\right)+74\)
=> Đpcm
Ta có: \(\left(x-3\right)^2+65\)
\(=x^2-6x+9+65\)
\(=x^2-6x+74\)
\(=x\left(x-6\right)+74\)
=> Đpcm
chung minh rang da thuc P(x) co it nhat 2 nghiem biet rang:
X*P(x+2)-(x-3)*P(x-1)=0
chung minh rang : A(x) = x2 _ 2x + 3 không có nghiệm
cho da thuc p(x) thoa man : (x-2)p(x+5)=(x2-9)p(x+2). chung minh rang p co it nhat 3 nghiem
Cho X>Y>0 chung minh rang X^3>X^3
cho x,y,z la 3 so thuc tuy y thoa man x+y+z=0 va -1< x<1,-1<y<1,-1<z<1.chung minh rang da thuc x^2+y^4+z^6 co gia tri khong lon hon 2
cho ham so f(x) = a^2.x + 2015.chung minh rang khong the xay ra dong thoi f(3) = 17k +7 va f(2) = 13k +1
Cho da thuc P(x)=2(x-3)2 +5
Chung minh rang da thuc da thuc da cho khong co nghiem
cho a=x 3y, b=x 2y 2, c=xy 3 .Chung minh rang voi moi so huu ti x va y ta luon duoc ax+b 2-2x 4y 4=0
chung minh rang :B=x.y(x^2-y^2).(x^2+y^2)chia het cho 30 (x;y la so nguyen)