Question

1) -9(3x-48)(x+1)=0
2) 8,5x+3(0,5x-4)=18

Answer 1

1)  -9(3x-48)(x+1)=0

3х-48=0

3х=48

х=16

х+1=0

х=-1

2)  3(0.5x-4)+8.5x=18

1.5x -12 +8.5x=18

10x=18+12

x= 30:10

х=3

Answer 2

1)-9(3x^2-3x-48x-48)=0
27x^2 +459x+432=0
D=210681 - 4*27*432=46656
x1=(459+216) /54= 12,5
x2= (459-216)/54= 4,5
2)8,5x+1,5x-12=18
10x=30
x=3