Помогите пожалуйста)номер 247

Решите задачу:

$1)\,\,\,2x^2+3x=0 \\ \\ x(2x+3)=0 \\ \\ x_1=0;\,\,\,\,\,\,\,\,x_2=-1.5$

$2)\,\,\,\,\,3x^2-2=0 \\ \\ x^2= \frac{2}{3} \\ \\ x_1_,_2=\pm \frac{ \sqrt{2} }{ \sqrt{3} }$

$3)\,\,\,\,\,5u^2-4u=0 \\ \\ u(5u-4)=0 \\ \\ u_1=0\,\,\,\,\,\,\, u_2= \frac{4}{5}$

$4)\,\,\,\,\,\,7a-14a^2=0 \\ \\ 7a(1-2a)=0 \\ \\ a_1=0;\,\,\,\,\,\,\,a_2=0.5$

$5)\,\,\,\,\, 1-4y^2=0 \\ \\ y^2= \frac{1}{4} \\ \\ y_1_,_2=\pm \frac{1}{2}$

$6)\,\,\,\,\,2x^2-6=0 \\ \\ 2(x^2-3)=0 \\ \\ x_1_,_2=\pm \sqrt{3}$