If x is a number such that x^2 + 2x - 24 = 0 and x^2 - 5x + 4 = 0, then x =
Select.
A) 4 B) -4 C) -3 D) -6 E) 1
x^2 + 2x - 24 = (x+6)(x-4) = 0   Then x=-6 or x=4.   x^2 - 5x + 4 = (x-4)(x-1) = 0   Then x=4 or x=1.   Thus x=4.   The answer is 4.
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If x is a number such that x^2 + 2x - 24 = 0 and x^2 - 5x + 4 = 0, then x =