\(-4x\left(x-5\right)-2x\left(8-2x\right)=-3\)
\(\Leftrightarrow-4x^2+20x-16x+4x^2=-3\)
\(\Leftrightarrow4x=-3\Leftrightarrow x=\frac{-3}{4}\)
a, Tim x biet:/x-2/+/3-2x/=2x+1
b, Tim x,y thuoc Z biet:xy+2x-y=5
c, tim x,y,z, biet :2x=3y;4y=5zva 4x-3y+5z=7
P(x)=2x^5+2x+8-3x^2-2x^5+2x^3-4x^4 tim bậc của p(x)
Tim x biet:
a.|x|+|x+2|=3
b.|3x-5|=|x+2|
c.|2x+3|-4x<9
tim x biet a) |3x-2|+5x=4x-10
b)3+ |2x+5|>13
tim x biet (x+1)*(2x-1)*(4x+3) lon hon 0
tim x biet :
a) ( 2x^2+4 ) - (x^2-3/2 ) = (-3+4x^2)+ ( -4x^2/3+1)
b) ( I xI -4) - ( 2- I-xI ) = 1/3 . I xI -5
tim cap so x,y nguyen biet :
a,\(|2x+3|+|2x-1|=\frac{8}{2|x-5|+2}\)
tim x, y biet
4x/5=2y/9 va 2x-3y= -18
tìm x,y,z biết x/-3=y/-7=z/12 và -2x-4y+5z=146
bài 2
tim x, y z biet 4x/-5=2y/7=-3z/8 và x+3y-2z=-273
giai nhanh dung minh tick