А) X² -144=0б)100-81x²=0в)196-y²=0г)225y² -64=0  

X² -144=0 X²=144>0 X[latex] _{1} [/latex]=√144=12 X[latex] _{2} [/latex]=-√`44=-12 100-81x²=0 -81x²=-100 x²=[latex] \frac{100}{81} [/latex]>0 x[latex] _{1} [/latex]=[latex] \sqrt{ \frac{100}{81} } [/latex]=[latex] \frac{10}{9} = 1 \frac{1}{9} [/latex] x[latex] _{2} [/latex]=[latex]- \sqrt{ \frac{100}{81} } =- \frac{10}{9} =-1 \frac{1}{9} [/latex] 196-y²=0 -y²=-196 y²=196>0 y[latex] _{1} [/latex]=√196=14 y[latex]_{2} [/latex]=-√196=-14 225y² -64=0 225y²=64 y²=[latex] \frac{64}{225} [/latex]>0 y[latex] _{1} [/latex]=[latex] \sqrt{ \frac{64}{225} } = \frac{8}{15} [/latex] y[latex]_{2} [/latex]=[latex]- \sqrt{ \frac{64}{225} } = -\frac{8}{15} [/latex]