Question 19
Quadratic EquationsSolve the following equation for x.
x2 + (2/r2)x + 1/r4 = 0
- A.r2
- B.1/r2
- C.−1/r2
- D.1/r
Show the answer and explanation
Answer: C (−1/r2)
Explanation
The left side is a perfect square: (x + 1/r²)² = 0. So x = −1/r².
Solve the following equation for x.
x2 + (2/r2)x + 1/r4 = 0
Answer: C (−1/r2)
The left side is a perfect square: (x + 1/r²)² = 0. So x = −1/r².