Question

[Đào Tú Anh]

Tim cap so x,y thoa man:

(x+y-2)^2  +7 = 14 / |y-1| + |y-3|

|x+y+2| + 5 = 30 / 3 |y+5| + 6

(2-x) (x+1) = |y+1|

(x+3) (1-x) = |y|

(x-2) (5-x) = |2y+1| + 2

Xac dinh a va b biet nghiem cua da thuc f(x) = (x-1) (x+2) cx la nghiem cua da thuc g(x) = x^3 + a x^2 + bx + 2