The graph of the curve \(y = 2x^2 – 5x – 1\) and a straight line PQ were drawn to solve the equation \(2x^2 – 5x + 2 = 0\)
What is the equation of the straight line PQ?
- y = -1
- y = 1
- y = 3
-
y = -3
The correct answer is: D
Explanation
Let the straight line PQ = y
2x\(^2\) - 5x - 1 - y = 2x\(^2\) - 5x + 2
y = 2x\(^2\) - 5x - 1 - 2x\(^2\) + 5x - 2
y = -3