Ada draws the graph of y = x2 - x - 2 and y = 2x - 1 on the same axes. Which of these equations is she solving?
A
x2 - x - 3 = 0
B
x2 - 3x - 1 = 0
C
x2 - 3x - 3 = 0
D
x2 + 3x - 1 = 0
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
Given; y = x2 - x - 2, y = 2x - 1
Using y = y, gives
x2 - x - 2 = 2x - 1
x2 - 3x - 2 + 1 = 0
therefore, x2 - 3x - 1 = 0
Source: Myschool Past Questions Archive (Record #45712)