Solve the following simultaneous equation for x. x2 + y – 5 = 0, y…

Solve the following simultaneous equation for x. x2 + y – 5 = 0, y – 7x + 3 = 0
  • A.
    -2, 4
  • B.
    2, 4
  • C.
    -1,8
  • D.
    1, -8
Correct Answer: Option D
Explanation

x2 + y – 5 = 0…..(i)
y – 7x + 3 = 0………(ii)
y = 7x – 3, substituting the value of y in equation (i)
x2 + (7x – 3) – 5 = 0
x2 + 7x + 3 = 0
(x + 8)(x – 1) = 0
x = -8 or 1

You May Also Like