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)

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

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

x = 9 + 15, x = 9 - 15

Decimal Notation

x = 12.87298 \dots, x = 5.12701 \dots

Solution steps

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

Solve with the quadratic formula

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

(- 18)^{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

\frac{7}{8} \cdot 4

\frac{( 2 - 3 x )}{2 x + 3} < 1

- 4 (- 3)^{2} + 4 - (6 - 2)

10 x^{2} - 40 x - 60 = 0

\frac{1}{2} (x - \frac{1}{3}) = \frac{3}{4} - \frac{x}{6}

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)