Решите систему уравнений x2+y2=100 (x-7y) (x+7y)=0

x²+y²=100 (x-7y) (x+7y)=0 x²+y²=100x²-49y²=0 x²+y²=100-x²+49y²=0-50y²=100y²=2y=-√2 ∨ y=√2 x²+(-√2) ²=100x²+2=100x²=98x=-7√2∨ x=7√2 x²+(√2) ²=100x²+2=100x²=98x=-7√2∨ x=7√2 (-7√2,-√2) , (7√2,-√2) , (-7√2,√2) , (7√2,√2)