Các câu hỏi tương tự
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
Cho he phuong trinh (1) 4x + 5y = 14 ; (2) 5x + 4y = 13 hỏi 9x + 9y = ?
tim cac cap so la nghiem cua moi phuong trinh sau:
a)2x+3y=5
b)x-3y=0
c)6x-15y=4
xac dinh cac he so cua phuong trinh \(^{x^2+px+q=0}\) (x la an so) (1),biet \(x_1-x_2=5\) va \(x_1^3-x_2^3=35\)(\(x_1;x_2\)la cac nghiem cua phuong trinh (1))
so nghiem cua phuong trinh;
\(x^2+\frac{4x^2}{\left(x+2\right)^2}\)la...........
cho phuong trinh 2x2 - mx -20 =0 (tham so m) . a; chung minh rang phuong trinh co hai nghiem trai giau voi moi m .b; tim m phuong trinh co 2 nghiem x1,x2 thoa man 2x1-x2=12
Giai he phuong trinh bang phuong phap cong va phuong phap the
<=> \(\left\{{}\begin{matrix}4x+3x=-6\\\dfrac{x+3y}{3}-\dfrac{y-2}{5}=1\end{matrix}\right.\)
tim tat ca cac nghiem nguyen (x, y) cua phuong trinh x*3+y*3=(x+y)²
cho phuong trinh 2x2+4x-1=0 co hai nghiem x1,x2. khong giai phuong trinh hay tinh gia tri cua bieu thuc A=x1x2+x13x2