ПОЖАЛУЙСТА!!!! Решите эти 2 примера

а) [latex](x-1)^{2}-9=0[/latex] [latex] x^{2} -2x+1-9=0[/latex] [latex] x^{2} -2x-8=0[/latex] [latex]D=4-4*1*(-8)=4+32=36[/latex] [latex]D= \sqrt{36}=6[/latex] [latex] x_{1}= \frac{2-6}{2}= \frac{-4}{2}=-2[/latex] [latex] x_{2}= \frac{2+6}{2}= \frac{8}{2}=4[/latex] б) [latex]81- (y+1)^{2}=0 [/latex] [latex]81= (y+1)^{2} [/latex] [latex]81= y^{2}+2y+1[/latex] [latex] y^{2}+2y-80=0[/latex] [latex]D=4-4*1*(-80)=4+320=324[/latex] [latex]D= \sqrt{324}=18[/latex] [latex] y_{1}= \frac{-2-18}{2}= \frac{-20}{2}=-10[/latex] [latex] y_{2}= \frac{-2+18}{2}= \frac{16}{2}=8[/latex]