Question

mim ajuda por favor!!

Answer 1

a) (x-1)(x-2)>0
x^2-2x-1x+2>0
x^2-3x+2>0
(x-1)(x-2)>0
X1 - 1 > 0》X1 > 1
X2 - 2 > 0》X2 > 2

b) (-2x+1)(3x-6)>0
-6x^2-12x+3X-6>0
-6x^2+9x-6>0
a=-6 b=9. c=-6
Delta=b^2-4ac
Delta=(-6)^2-4(-6)(9)
Delta=36+24(9)
Delta=36+216
Delta=252
X= - b +,- \/Delta /2a
X= - (9) +,- \/252 / 2(-6)
X = - 9 +,- 15,87/- 12
X1=-9+15,87/-12》X1=9+15,87/12》X1=24,87/12》X1=2,07
X2=-9-15,87/-12》X2=9-15,87/12》X2=-6,67/12》X2= - 0,57