What are the solutions to the equation -90=x(x-18) ?

The solutions to the equation -90=x(x-18) are x=9+3i,x=9-3i

Find the zeros of -90=x(x-18)

The zeros of -90=x(x-18) are x=9+3i,x=9-3i

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

- 90 = x (x - 18)

x = 9 + 3 i, x = 9 - 3 i

Solution steps

- 90 = x (x - 18)

Expand

x (x - 18) : x^{2} - 18 x

- 90 = x^{2} - 18 x

Switch sides

x^{2} - 18 x = - 90

Move

90

to the left side

x^{2} - 18 x + 90 = 0

Solve with the quadratic formula

x_{1, 2} = \frac{- ( - 18 ) \pm ( - 18 ) ^{2} - 4 \cdot 1 \cdot 90}{2 \cdot 1}

Simplify

(- 18)^{2} - 4 \cdot 1 \cdot 90 : 6 i

x_{1, 2} = \frac{- ( - 18 ) \pm 6 i}{2 \cdot 1}

Separate the solutions

x_{1} = \frac{- ( - 18 ) + 6 i}{2 \cdot 1}, x_{2} = \frac{- ( - 18 ) - 6 i}{2 \cdot 1}

x = \frac{- ( - 18 ) + 6 i}{2 \cdot 1} : 9 + 3 i

x = \frac{- ( - 18 ) - 6 i}{2 \cdot 1} : 9 - 3 i

The solutions to the quadratic equation are:

x = 9 + 3 i, x = 9 - 3 i

4 x^{2} - 6 = 394

- 9 x^{2} - 15 x - 59 = 0

y, x = y^{2} + 1

z^{2} + 2 z = i - 1

3 x^{2} - 11 x + 16 = 0

What are the solutions to the equation -90=x(x-18) ?
The solutions to the equation -90=x(x-18) are x=9+3i,x=9-3i
Find the zeros of -90=x(x-18)
The zeros of -90=x(x-18) are x=9+3i,x=9-3i