Bonsoir,
Résoudre:
A) x²+1 > (x+1)²
x²+1 - (x+1)² > 0
x²+1-(x²+x+x+1) > 0
x²+1-(x²+2x+1) > 0
x²+1-x²-2x-1 > 0
-2x > 0
2x < 0
x < 0
S= ] -∞; 0 [.
B) 3-4x<6(x-2)-10x
3-4x < 6x-12-10x
3-4x < -4x-12
3-4x+4x < -12
3 < -12
S= ∅
C) 3(1-2x)>-6x+2
3-6x < -6x+2
3-6x+6x < 2
3 > 2
x ∈ R.