What is the greater solution of ?
Answer and explanation
Correct answer: B. 0
- -1 is the smaller of the two solutions ().
- 3 is an extraneous value.
- 1 reverses the sign of the root .
- 3 is an extraneous value.
- 1 reverses the sign of the root .
- Step 1: Factor the quadratic equation: find two numbers that multiply to and add to , giving .
- Step 2: Set each factor to zero to find the roots: and .
- Step 3: Compare the two solutions: between and , the greater solution is .
Answer
0.
Practise more Quadratic equations.
Free questions with an explanation for every one, and full timed ACT mock tests.