a) \(\Delta=169-56=113>0\)
\(\hept{\begin{cases}x_1=\frac{13+\sqrt{113}}{14}\\x_2=\frac{13-\sqrt{113}}{14}\end{cases}}\)
b) \(\Delta=25-4.3.60< 0\)
vô nghiệm
giai phuong trinh va he phuong trinh sau:
x2 + 5x -6=0
b{4x+5y=3
{x-3y=5
giai mau giup toi nhe cac ban
giai phuong trinh
4x2+\(\sqrt{3x+1}\)+5=13x
giai phuong phuong trinh : \(\sqrt{2x^2+5x-3}-\sqrt{2x-1}=0\) 0
CM: \(|ab+cd|\subseteq\sqrt{\left(a^2+c^2\right)\left(b^2+d^2\right)}\)
giai phuong trinh nghiem nguyen 8x2-7x+-13= y(x-1)2
Giai phuong trinh sau:5x^4-2 x^2 +3x^2√x^2 +2=4
giai phuong trinh √x-1 -√5x-1 =√3x-2
GIAI PHUONG TRINH:
x4 - 13x + 36 = 0
giai phuong trinh
a) \(\sqrt{3x^2-7x+3}-\sqrt{x^2-2}=\sqrt{3x^2-5x-1}-\sqrt{x^2-3x+4}\)
b) x2 - 25 = y ( y + 6 ) (x; y nguyên)
giai phuong trinh x4+6x3+7x-6x+1=0