-0,25х+0,8=1,3 (5+х)(х-1)=0

Question

-0,25х+0,8=1,3
(5+х)(х-1)=0

Answer 1

-0.25x+0.8=1.3
-0.25x=1.3-0.8
-0.25x=0.5
x=-2


(5+x)(x-1)=0
5x-5+x²-x=0
x²+4x-5=0
D=4²-4*(-5)=16+20=36, √36=6
x₁=-4+6/2=1
x₂=-4-6/2=-5

Answer 2

-0.25х+0,8=1,3
0,8-1,3=0,25х
-0,5=0,25х
х=-05/0,25
х=-2

((5+х)(х-1)=0
5+х=0 
=-5

х-1=0
=1