2x-6>0x2+8x+7≥0
x2+8x+7≥0 2x-6>0
D=8^(2)-4*1*7=64-28=36 2x>6|/2
x1=-8-6/2=-7 x>3
x2=-8+6/2=-1
(x+7)(x+1) ≥0
2x-6>0
x2+8x+7≥0
x2+8x+7≥0 2x-6>0
D=8^(2)-4*1*7=64-28=36 2x>6|/2
x1=-8-6/2=-7 x>3
x2=-8+6/2=-1
(x+7)(x+1) ≥0