What are the solutions to the equation x^2+18x+66=0 ?

The solutions to the equation x^2+18x+66=0 are x=-9+sqrt(15),x=-9-sqrt(15)

Find the zeros of x^2+18x+66=0

The zeros of x^2+18x+66=0 are x=-9+sqrt(15),x=-9-sqrt(15)

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x^{2} + 18 x + 66 = 0

x = - 9 + 15, x = - 9 - 15

Decimal Notation

x = - 5.12701 \dots, x = - 12.87298 \dots

Solution steps

x^{2} + 18 x + 66 = 0

Solve with the quadratic formula

x_{1, 2} = \frac{- 18 \pm 1 8 ^{2} - 4 \cdot 1 \cdot 66}{2 \cdot 1}

1 8^{2} - 4 \cdot 1 \cdot 66 = 215

x_{1, 2} = \frac{- 18 \pm 2 15}{2 \cdot 1}

Separate the solutions

x_{1} = \frac{- 18 + 2 15}{2 \cdot 1}, x_{2} = \frac{- 18 - 2 15}{2 \cdot 1}

x = \frac{- 18 + 2 15}{2 \cdot 1} : - 9 + 15

x = \frac{- 18 - 2 15}{2 \cdot 1} : - 9 - 15

The solutions to the quadratic equation are:

x = - 9 + 15, x = - 9 - 15

x, (x - 2)^{2} + y^{2} = 4

(2 x - 5) (x + 1) = 2

5 x^{2} - 20 x - 25 = 0

5 x^{2} + 8 x = - 5

x, y^{2} x^{2} - 4 x^{2} - 4 y^{2} = 0

What are the solutions to the equation x^2+18x+66=0 ?
The solutions to the equation x^2+18x+66=0 are x=-9+sqrt(15),x=-9-sqrt(15)
Find the zeros of x^2+18x+66=0
The zeros of x^2+18x+66=0 are x=-9+sqrt(15),x=-9-sqrt(15)