This system has two solutions for (x, y). What is the larger value of x ?
A. 2-
B.
C. 2 +
D. 5
Answer:C
This system has two solutions for (x, y). What is the larger value of x ?
A. 2- B. C. 2 + D. 5
Explanation: C Start by setting the two equations equal to each other to get x2 - 2x = 2x - 1. Manipulate the equation into the ax2 + bx + c = 0 form, which is x2 - 4x + 1 = 0. Use the quadratic equation, which states that x = to get x = . Solve for x to get x = , then x = or x = , so x = 2 ± . The greater of the two possible values for x is x = 2 + . Therefore, the correct answer is (C).