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

Mathematics

JAMB 1993

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

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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

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

Correct Answer: Option D

Explanation

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