What are the solutions to the equation x^2-20x-18=7 ?

The solutions to the equation x^2-20x-18=7 are x=5(2+sqrt(5)),x=5(2-sqrt(5))

Find the zeros of x^2-20x-18=7

The zeros of x^2-20x-18=7 are x=5(2+sqrt(5)),x=5(2-sqrt(5))

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

x^{2} - 20 x - 18 = 7

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

Decimal Notation

x = 21.18033 \dots, x = - 1.18033 \dots

Solution steps

x^{2} - 20 x - 18 = 7

Move

7

to the left side

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

Solve with the quadratic formula

x_{1, 2} = \frac{- ( - 20 ) \pm ( - 20 ) ^{2} - 4 \cdot 1 \cdot ( - 25 )}{2 \cdot 1}

(- 20)^{2} - 4 \cdot 1 \cdot (- 25) = 105

x_{1, 2} = \frac{- ( - 20 ) \pm 10 5}{2 \cdot 1}

Separate the solutions

x_{1} = \frac{- ( - 20 ) + 10 5}{2 \cdot 1}, x_{2} = \frac{- ( - 20 ) - 10 5}{2 \cdot 1}

x = \frac{- ( - 20 ) + 10 5}{2 \cdot 1} : 5 (2 + 5)

x = \frac{- ( - 20 ) - 10 5}{2 \cdot 1} : 5 (2 - 5)

The solutions to the quadratic equation are:

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

\frac{∣ 2 x - 1 ∣}{x + 1} \leq 2

10 = - 5 (x - 4)

20 \cdot \frac{1}{1000} \cdot 11 \cdot 0.12 \cdot \frac{365}{1}

3 x^{4} - 27 x^{3} + 60 x^{2}

20 \geq - 5 y

What are the solutions to the equation x^2-20x-18=7 ?
The solutions to the equation x^2-20x-18=7 are x=5(2+sqrt(5)),x=5(2-sqrt(5))
Find the zeros of x^2-20x-18=7
The zeros of x^2-20x-18=7 are x=5(2+sqrt(5)),x=5(2-sqrt(5))