Answer and Explanation
Your Answer is
Correct Answer is G
Explanation
Let him be x years old. Then there is x2-23x-50=0, and the solution is $$ x1=25, x2=-2. Drop x 2. It is concluded that the teacher is 25 years old.
Your Answer is
Correct Answer is G
Explanation
Let him be x years old. Then there is x2-23x-50=0, and the solution is $$ x1=25, x2=-2. Drop x 2. It is concluded that the teacher is 25 years old.