csat-suneung 2013 Q4

csat-suneung · South-Korea · csat__math-science 3 marks Inequalities Solve Polynomial/Rational Inequality for Solution Set
The product of all real roots of the irrational equation $x ^ { 2 } - 2 x + 2 \sqrt { x ^ { 2 } - 2 x } = 8$ is? [3 points]
(1) - 5
(2) - 4
(3) - 3
(4) - 2
(5) - 1
The product of all real roots of the irrational equation $x ^ { 2 } - 2 x + 2 \sqrt { x ^ { 2 } - 2 x } = 8$ is? [3 points]\\
(1) - 5\\
(2) - 4\\
(3) - 3\\
(4) - 2\\
(5) - 1