3-(4x+1)(3-x)=x^2 Хелп

Question

3-(4x+1)(3-x)=x^2
Хелп

Answer 1

3-(12x-4x^2+3-x)=x^2
3-(11x-4x^2+3)=x^2
3-11x+4x^2-3=x^2
-11x+4x^2=x^2
-11x+4x^2-x^2=0
-x(11-4x+x)=0
-x(11-3x)=0
-x=0
11-3x=0
-3x=0-11
3x=11
x=11/3
x=3 2/3