Система уравнений x^2+y^2=41 y+х=9

Х^2 + y^2 = 41 y + x = 9 •••••••••• y = 9 - x X^2 + ( 9 - x )^2 = 41 X^2 + 81 - 18x + x^2 - 41 = 0 2x^2 - 18x + 40 = 0 2( x^2 - 9x + 20 ) = 0 D = 81 - 80 = 1 = 1^2 X1 = ( 9 + 1 ) : 2 = 5 X2 = ( 9 - 1 ) : 2 = 4 y = 9 - x y1 = 9 - 5 = 4 y2 = 9 - 4 = 5 Ответ ( 5 ; 4 ) ; ( 4 ; 5 )