Which of the following equations has the sum of its roots 3 ?
1) 2x2-3x+9=0
2) -x2+3x-3=0
3) 3x2-3x+3=0
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Answer:
The correct option is 2.
Step-by-step explanation:
If a quadratic equation is defined as
Then the sum of its roots is .
In option 1:
The given equation is
The value of a is 2 and the value of b is -3.
The sum of its roots is not equal to 3. Therefore option 1 is incorrect.
In option 2:
The given equation is
The value of a is -1 and the value of b is 3.
The sum of its roots is 3. Therefore option 2 is correct.
In option 3:
The given equation is
The value of a is 3 and the value of b is -3.
The sum of its roots is not equal to 3. Therefore option 3 is correct.
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