What are the solutions to the equation x^2-18x-4=0 ?

The solutions to the equation x^2-18x-4=0 are x=9+sqrt(85),x=9-sqrt(85)

Find the zeros of x^2-18x-4=0

The zeros of x^2-18x-4=0 are x=9+sqrt(85),x=9-sqrt(85)

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x^{2} - 18 x - 4 = 0

x = 9 + 85, x = 9 - 85

Decimal Notation

x = 18.21954 \dots, x = - 0.21954 \dots

Solution steps

x^{2} - 18 x - 4 = 0

Solve with the quadratic formula

x_{1, 2} = \frac{- ( - 18 ) \pm ( - 18 ) ^{2} - 4 \cdot 1 \cdot ( - 4 )}{2 \cdot 1}

(- 18)^{2} - 4 \cdot 1 \cdot (- 4) = 285

x_{1, 2} = \frac{- ( - 18 ) \pm 2 85}{2 \cdot 1}

Separate the solutions

x_{1} = \frac{- ( - 18 ) + 2 85}{2 \cdot 1}, x_{2} = \frac{- ( - 18 ) - 2 85}{2 \cdot 1}

x = \frac{- ( - 18 ) + 2 85}{2 \cdot 1} : 9 + 85

x = \frac{- ( - 18 ) - 2 85}{2 \cdot 1} : 9 - 85

The solutions to the quadratic equation are:

x = 9 + 85, x = 9 - 85

(1 + i) (1 - i)

∣ x ∣ > 11

\frac{2 b a ^{3}}{7} - \frac{a b ^{3}}{5}

- 121

- 32 x^{2} + 50

What are the solutions to the equation x^2-18x-4=0 ?
The solutions to the equation x^2-18x-4=0 are x=9+sqrt(85),x=9-sqrt(85)
Find the zeros of x^2-18x-4=0
The zeros of x^2-18x-4=0 are x=9+sqrt(85),x=9-sqrt(85)