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

View answer & explanation

Correct answer is B

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

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