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2 April, 16:46

Solve using polynomial equations by factoring and using the principle of zero product.

X^3 - 27 = 0

+3
Answers (2)
  1. 2 April, 17:14
    0
    Here x^3-27=0 can be written as

    x^3=27 and it also can be,

    x^3=3^3

    then on comparing both we got,

    x=3 ...

    Hope it will satisfy you
  2. 2 April, 18:07
    0
    (x-3) (x^2+3x+27) = 0

    ---

    Solve the quadratic factor:

    x^2 + 3x + 27 = 0

    x = [-3 + - sqrt (9-4*27) / 2

    ---

    x = [-3 + - sqrt (-99) ]/2

    --

    x = [-3+-3sqrt (11) i]/2 (2 complex number solutions)

    x = 3 (the Real Number solution)
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