СРОЧНО!! ПОМОГИТЕ Решение СИСТЕМ. Пожалуйста напишите решение каждой системы. Не мало балов Зарание СПАСИБО

б) x^2 - y = 2 X + y = 4 x^2 - (4-x) = 2 y = 4 -x x^2 + x - 6 = 0 y = 4-x D = 1 + 24 = 5^2 X1 = (-1 + 5)/2 = 2 X2 = (-1-5)/2 = -3 Y1 = 4-2 = 2 Y2 = 4-(-3) = 7 в) x^2 + y^2 = 25 xy = 12 x^2 + (12/x)^2 = 25 y = 12/x X^2 + 144/x^2 = 25|*x^2 Y = 12/x X^4 - 25x^2 + 144 = 0 Y = 12/x Пусть x^2 = t, t>=0 T^2 - 25t +144 = 0 D = 625 - 576 = 49 = 7^2 T1 = (25+7)/2 = 16 T2 = (25-7)/2 = 9 X^2 = 16 X1 = 4 Y1 = 12/4 = 3 X2 = -4 Y2 = 12/-4 = -3 X^2 = 9 X1 = 3 Y1 = 12/3 = 4 X2 = -3 Y2 = 12/-3 = -4 б) y - 5x = 3 - x^2 - 2xy + y^2 = -1 Y = 3+5x -x^2 -2x(3+5x) + (3+5x)^2 = -1 Y = 3+5x -x^2 - 6x - 10x^2 + 9 + 30x + 25x^2 = -1 Y = 3+5x 14x^2 + 24x + 10 = 0 Y = 3+5x 7x^2 + 12x + 5 = 0 D = 144 - 140 = 2^2 X1 = (-12+2)/14 = -5/7 X2 = (-12-2)/14 = -1 Y1 = 3 + 5*(-5/7) = 3 - 25/7 = 4/7 Y2 = 3 + 5*(-1) = -2 в)x^2 + y^2 + 2xy = 49 X - y = 3 (3 + y)^2 + y^2 + 2y(3 + y) = 49 X = 3 + y 9 + 6y + y^2 + y^2 + 6y + 2y^2 = 49 X = 3+y 4y^2 + 12y - 40 = 0 X = 3+y Y^2 + 3y - 10 = 0 X= 3+y D= 9 + 40 = 7^2 Y1 = (-3+7)/2 = 2 Y2 = (-3-7)/2 = -5 X1 = 3+2 = 5 X2 = 3 -5 = -2