Giai phuong trinh :
7x^2 - 13x + 2 = 0
3x^2 + 5x + 60 = 0
Giai cac phuong trinh :
a\(\frac{12}{x-1}-\frac{8}{x+1}=1\)
b\(\frac{x^3+7x^2+6x-30}{x^3-1}=\frac{x^2-x+16}{x^2+x+1}\)
giai phuong trinh nghiem nguyen 8x2-7x+-13= y(x-1)2
Giai phuong trinh :\(\sqrt{6x-1}+\sqrt{9x^2-1}=1\)
cho phuong trinh : x^ - 6x + m-1 =0 . tim m de phuong trinh co hai nghiem x1,x2 thoa man x1^ + x2^ =12
$\sqrt{25x^2+80x+64}+\sqrt{9x^2-6x+1}=\sqrt{4x^2+36x+81}$
Giai phuong trinh
$\sqrt{25x^2+80x+64}+\sqrt{9x^2-6x+1}=\sqrt{4x^2+36x+81}$
giai phuong trinh
Giai phuong trinh :\(\sqrt{2-x^2+2x}+\sqrt{-x^2-6x+8}=1+\sqrt{3}\)
1)Giai phuong trinh:
a) x4+4x2-5=0
b)Cho phuong trinh: x2-2(m+1)x+m2+3m-4=0(1)
Giai phuong trinh khi m=2Chung minh phuong trinh luon co nghiem voi moi m.Goi x1,x2 la nghiem cua phuong trinh,tim m de thoa man dieu kien:x12+x22=10