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I am lazy, so I use the quadratic equation if I can not factor easily by inspection.

X^2 - 4X + 24 = 0

X = -b +/- sqrt(b^2-4a)/2a

a = 1

b = -4

c = 24

-(-4) +/- sqrt[(-4)^2 - 4(1)(24)]/2(1)

looks bad already. let us try discriminant

b^2 -4ac

16 -96

this equation has no real solution

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14y ago

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Q: What is x squared-4x plus 24 factored?
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