Question

3x/10(2-x) -3(x+2)=-6/40

Answer 1

3x/10(2-x)-3(x+2)=-6/40

3x/5-3x^2/10-3x-6=-3/20

(6x-3x^2)/10-3x-6=-3/20

(6x-3x^2-30x)/10-6=-3/20

(-24x-3x^2)/10-6=-3/20

(-24x-3x^2)/10=-3/20+6

(-24x-3x^2)/10=117/20

(-24x-3x^2)=117/20*10

(-24x-3x^2)=117/10

-3x(8+x)=117/10

8+x=(117/10)/3x

-3x*x=117/10-8

-3x^2=37/10

x^2=(37/10)/-3

x^2=37/-30

x=sqrt(37/-30)

x=-1.11 approx.