Solve the simultaneous equations for x in x2 + y - 8 = 0, y + 5x - 2 = 0

A.

-28, 7

B.

6, -28

C.

6, -1

D.

-1, 7

E.

3, 2

View answer & explanation

Correct answer is C

x2 + y - 8 = 0, y + 5x - 2 = 0

Rearranging, x2 + y = 8.....(i)

5x + y = 2.......(ii)

Subtract eqn(ii) from eqn(i)

x2 - 5x - 6 = 0

(x - 6)(x + 1) = 0

x = 6, -1

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