Помогите решить систему уравнения !! 2x^2 + 3y^2 = 21 6x^2 + 9y^2 = 21x
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2X^2 + 3y^2 = 21 6x^2 + 9y^2 = 21x -------------------------- - 6x^2 - 9y^2 = - 63 6x^2 - 6x^2 + 9y^2 - 9y^2 = 21x - 63 21x - 63 = 0 21x = 63 x = 3 2x^2 + 3y^2 = 21 2*9 + 3y^2 = 21 3y^2 = 3 y^2 = 1 y1 = 1 y2 = - 1 ОТВЕТ ( 3 ; 1 ) ; ( 3 ; - 1 )