д)[latex] x^{2} =4[/latex]; [latex] x= sqrt{4} [/latex]; [latex] x=[/latex]+-2е)[latex] x^{2} =8[/latex]; [latex] x= sqrt{8} [/latex]; [latex] x= sqrt{2*4} [/latex]; [latex] x= +-2sqrt{2} [/latex]б)[latex] x^{2} =-4 x[/latex]; [latex] x^{2} +4 x=0; x(x+4)=0; x=0  v x=-4[/latex]

б) [latex] x^{2} =-4x[/latex][latex] x^{2} +4x=0[/latex][latex] x*(x} +4)=0[/latex][latex]x_{1} =0, x_{2} =-4[/latex]д) [latex] x^{2} =4[/latex][latex]x=+- sqrt{4} [/latex][latex] x_{1} =2, x_{2} =-2[/latex]е) [latex] x^{2} =8[/latex][latex] (x^{2} -8)=0[/latex][latex] (x - sqrt{8} )* (x + sqrt{8} )=0[/latex]так как [latex] sqrt{8} = sqrt{4*2} =2 sqrt{2} [/latex] , то:[latex](x - 2sqrt{2} )* (x + 2sqrt{2} )=0[/latex][latex]x_{1} =2sqrt{2}, x_{2} =-2sqrt{2}[/latex]