Question

1.5x(3+2x)=3x(x+1)-30

Answer 1

1,5х(3+2х)=3х(х+1)-30

4,5х+3х(в квадрате)=3х( в квадрате)+3х-30

4,5х-3х=-30

1,5х=-30

х=-20

Answer 2

4,5x+3x^2=3x^2+3x-30
4,5x+3x^2-3x^2-3x=-30
1,5x=-30:1,5
x=- 20