[2a+2b=14 [a^2+b^2=5^2 решите систему уравнений
[2a+2b=14 [a^2+b^2=5^2 ----------------- a+b=7 a=7-b (7-b)^2 + b^2 = 25 49 - 14b + b^2 + b^2 = 25 2b^2 - 14b + 24 =0 b^2 - 7b + 12 = 0 D= 49-48=1 b12= (7+-1)/2=3 4 b1 = 3 a1=7-b1=4 b2 = 4 a2=7-b2=3 Ответ (3 4 )(4 3)