Advanced MathEasy–MediumEquation with two given solutions
Advanced Math practice question
Which of the following equations has solutions x = 3 and x = −5?
- A. (x − 3)(x + 5) = 0Correct
- B. (x + 3)(x − 5) = 0
- C. (x − 3)(x − 5) = 0
- D. (x + 3)(x + 5) = 0
Answer: A. (x − 3)(x + 5) = 0
x − 3 = 0 gives 3; x + 5 = 0 gives −5.
Why the other answers are wrong
- B. (x + 3)(x − 5) = 0
- Solutions −3 and 5.
- C. (x − 3)(x − 5) = 0
- Solutions 3 and 5.
- D. (x + 3)(x + 5) = 0
- Solutions −3 and −5.
More Advanced Math questions
- Easy–Medium
If f(x) = 2x² − 3, what is f(4)? - Easy–Medium
Which expression is equivalent to (2x³)(3x⁴)? - Easy–Medium
What are the solutions to x² − 16 = 0? - Easy–Medium
Which expression is equivalent to (x + 5)²? - Easy–Medium
For x ≠ 0, which expression is equivalent to (x² + 3x) / x? - Easy–Medium
What are the solutions to the equation 2(x − 3)² − 32 = 0 ?
Not affiliated with the College Board. SAT is a trademark of the College Board.