1) (x-7)²-49=0⇒х²-14*х+49-49=0⇒х*(х-14)=0⇒х1=0 и х2=14
2) (6+y)²-81=0 ⇒36+12*y+y²-81=0⇒y²+12*y-45=0 Дискриминант D=12²+4*45=324 корни х1=(-12+√324)/2=3 и х2=(-12-√324)/2=-15
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1) (x-7)²-49=0⇒х²-14*х+49-49=0⇒х*(х-14)=0⇒х1=0 и х2=14
2) (6+y)²-81=0 ⇒36+12*y+y²-81=0⇒y²+12*y-45=0 Дискриминант D=12²+4*45=324 корни х1=(-12+√324)/2=3 и х2=(-12-√324)/2=-15