Question

Va rog ajutati-ma si pe mine la astea 3 puncte la mate .

Answer 1

4x+12>0
4x>-12
x>-3
x€{-2, -1}

3x+6>=0
3x>=-6
x>=-2
x€{-2, -1}

-5x-14<0
-5x<14
x>-14/5
x€{-2, -1}

Answer 2

Z-N = -Z

a) 4x+12 > 0

4x > -12 | :4

x > -3

x = { -2 ; -1 }

b) 3x+6 ≥ 0

3x ≥-6 | :3

x ≥ -2

x ={ -2 ; -1 }

c) -5x-14 < 0

-5x < 14 |* (-1 )

x > -14/5

x={ -2 : -1}