Sagot :

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.