What are the solutions to the equation x^3-9x^2-81x+729=0 ?

The solutions to the equation x^3-9x^2-81x+729=0 are x=9,x=-9

Find the zeros of x^3-9x^2-81x+729=0

The zeros of x^3-9x^2-81x+729=0 are x=9,x=-9

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x^{3} - 9 x^{2} - 81 x + 729 = 0

x = 9, x = - 9

Solution steps

x^{3} - 9 x^{2} - 81 x + 729 = 0

Factor

x^{3} - 9 x^{2} - 81 x + 729 : (x - 9)^{2} (x + 9)

(x - 9)^{2} (x + 9) = 0

Using the Zero Factor Principle:

ab = 0

then

a = 0

b = 0

x - 9 = 0 or x + 9 = 0

Solve

x - 9 = 0 : x = 9

Solve

x + 9 = 0 : x = - 9

The solutions are

x = 9, x = - 9

g (n) = n^{3} - 2 n, g (n + 4)

a^{4} - 8 a^{2} = - 15

x^{4} - 8 x^{2} = 0

t^{7} = 5^{5}

6 x^{3} - 8 = 46

What are the solutions to the equation x^3-9x^2-81x+729=0 ?
The solutions to the equation x^3-9x^2-81x+729=0 are x=9,x=-9
Find the zeros of x^3-9x^2-81x+729=0
The zeros of x^3-9x^2-81x+729=0 are x=9,x=-9