e) | x | + | y | = 0 f) | x - 3 | + | y + 2 | = 0
g) x.(x + 7) = 0 h) (x + 12).(x-3) = 0 i) (-x + 5).(3 – x ) = 0
k) x.(2 + x).( 7 – x) = 0 l) (x - 1).(x +2).(-x -3) = 0
Loga
Sinh Học lớp 12
