Question

ПОМОГИТЕ СРОЧНО!!!
2x-(x+1)^2=3x^2-6

Answer 1

$2x-(x+1)^{2} =3 x^{2} -6 \ 2x-( x^{2} +1+2x)=3 x^{2} -6 \ 2x- x^{2} -1-2x=3 x^{2} -6 \ - x^{2} -1-3 x^{2} +6 =0 \ -4 x^{2} +5=0\-4 x^{2} =-5\ x^{2} = frac{5}{4} \ \ x=+- frac{ sqrt{5} }{2}$