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JAMB Mathematics 1978 Question 34

Question 34

Linear and Simultaneous Equations

The set of values of x and y which satisfies the equations x2 − y − 1 = 0 and y − 2x + 2 = 0 is

  1. A.1,0
  2. B.1,1
  3. C.2,2
  4. D.0,2.
  5. E.1,2.
Show the answer and explanation

Answer: A (1,0)

Explanation

From the second equation y = 2x − 2. Substituting: x² − 2x + 1 = 0, so x = 1 and y = 0.