Question

Помогите решить    x+(sqrt(25-x^2))=7

Answer 1

$sqrt{25-x^2}=7-x\ 25-x^2=49-14x+x^2\ 2x^2-14x+24=0\ x^2-7x+12=0\ x_1=3\x_2=4\ 7-xgeq0\-xgeq-7\xleq7$

 Ответ : 3; 4

Answer 2

(sqrt(25-x^2))=7-x

25-x^2=49-14x+x^2

49-14x+x^2+x^2-25=0

x^2-7x+12=0

D=49-48=1

x=4

x=3