cho 2 bieu thuc A=x+x^2/2-x va B=2x/x+1+3/x-2-2x^2+1/x^2-x-2 a, tinh gia tri cua A khi /2x-3/=1 b,tim dieu kien xac dinh va rut gon bieu thuc B c,tim so nguyen x de P=A.B dat gia tri lon nhat
mk dang can gap
viet gon bieu thuc sau duoi dang 1 phan thuc :
(x2 -x+1)(x4 -x2 +1)
1. gia tri cua x thoa man (2x+3)(x+1)2-(2x+3)(2x-3)
2. so nghiem cua da thuc x3+6x2+11x+6 la ?
3. bieu thuc C = 8-5x-2x2 dat gia tri lon nhat tai x = ?
1.cho phan thuc P=\(\frac{5x-4y}{5x+4y}\)voi 25x2+16y2=50xy.khi do gia tri cua bieu thuc P=\(\frac{1+P^2}{1-P^2}\)la
2.gia tri lon nhat cua bieu thuc B=\(\frac{14}{\frac{x^2}{4}-3x+16}la\)
3.gia tri cua a de da thuc A=2x3+7x2+ax+3 chia het cho B=(x+1)2la a=?
giup to 3 bai nay
1. gia tri cua x thoa man (2x+3)(x+1)2-(2x+3)(2x-3)
2. so nghiem cua da thuc x3+6x2+11x+6 la ?
3. bieu thuc C = 8-5x-2x2 dat gia tri lon nhat tai x = ?
giup to 3 bai nay
1. gia tri cua x thoa man (2x+3)(x+1)2-(2x+3)(2x-3)
2. so nghiem cua da thuc x3+6x2+11x+6 la ?
3. bieu thuc C = 8-5x-2x2 dat gia tri lon nhat tai x = ?
Viet bieu thuc sau duoi dang binh phuong cua mot tong:
2xy2 +x2y4 +1
Phan tich da thuc sau thanh nhan tu:
a) x2 -3x +2
b) 3x2 - 7x -10
c) 2x2 -5x -7
HELP ME!!!
cho bieu thuc : M ( x phan x^2 -25 - x-5 phan x^2 +5x ) : 2x-5 phan 5x - x^2
a) rut gon M
b) tinh gia tri cua M voi x = -2010
c) tim tat ca cac gia tri nguyen cua x de M co gia tri nguyen.
giai chi tiet giup to may bai nay nha
1. Cho tam giac ABC co trung tuyen AM . Goi I la trung diem cua AM. Tia BI cat AC tai D, qua M ke duong song song voi BD cat CD tai E. Biet BD=18cm , khih do ID = ? cm
2. gia tri lon nhat cua bieu thuc Q= 5-x2+2x2-4y2-4y
3 . gia tri cua x thoa man (12x-5)(4x-1)+(3x-7)(1-16x)=81 , x=?
4. x+y=3 , gia tri cua bieu thuc Q = x2+2xy+y2-4x-4y+1=?
5 . a+b+c=0 va abc=-2 thi a3+b3+c3= ?
6. rut gon bieu thuc(a2+b2)2-4a2b2voi a2-b2=5 ta duoc ket qua ?
