-12x+60+21-7x=5
-12x-7x=-60-21+5
-19x=-76
x=4
-12.x + 12.5+7.3-7.x=5
-12.x+ 60+21-7.x=5
-19.x=76
=> không có x
tim gia tri x thoa man x^5=x^4+x^3+x^2+x+2
làm nhanh giúp tôi nha ....
Tim cac so nguyen x y thoa man\(x^3+3x=x^2y+2y+5\)
Tim cap (x,y) thoa man ( x-y+2) . ( x-2) + ( x-y+2) . ( 2-x) =5
1. gia tri x >1 thoa man (9x-7)2=(5-2x)2
2.tong binh phuong tat ca cac gia tri x thoa man : 2(x+5)=x2+5x
3. gia tri cua x3+y3 biet x+y=2 va x2+y2=20
tim x thoa man : x^3 = x
tim cac cap so nguyen(x;y) thoa man; x^2+6xy=18 va x-2y=-7/2*y
tim cacso nguyen x thoa man: (x+2014)^2=64.(x+2017)^3
1.gia tri x<0 thoa man (2x-3)2=(x+5)2
2.tap hop cac gia tri cua x thoa man x4-2x3+10x2-20x=0 la S(....)
3.phan tich da thuc xy-12+3x-4 ta duoc (x+a)(y+b) khi do a+b=?
Tim so thuc m lon nhat thoa man:
(x^2+x).(x^2+11x+30)+7 >= m voi moi x
