What are the solutions to the equation 7x^3-9x^2-7x=-9 ?

The solutions to the equation 7x^3-9x^2-7x=-9 are x= 9/7 ,x=-1,x=1

Find the zeros of 7x^3-9x^2-7x=-9

The zeros of 7x^3-9x^2-7x=-9 are x= 9/7 ,x=-1,x=1

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

7 x^{3} - 9 x^{2} - 7 x = - 9

x = \frac{9}{7}, x = - 1, x = 1

Solution steps

7 x^{3} - 9 x^{2} - 7 x = - 9

Move

9

to the left side

7 x^{3} - 9 x^{2} - 7 x + 9 = 0

Factor

7 x^{3} - 9 x^{2} - 7 x + 9 : (7 x - 9) (x + 1) (x - 1)

(7 x - 9) (x + 1) (x - 1) = 0

Using the Zero Factor Principle:

ab = 0

then

a = 0

b = 0

7 x - 9 = 0 or x + 1 = 0 or x - 1 = 0

Solve

7 x - 9 = 0 : x = \frac{9}{7}

Solve

x + 1 = 0 : x = - 1

Solve

x - 1 = 0 : x = 1

The solutions are

x = \frac{9}{7}, x = - 1, x = 1

7 π k^{3} = 22704

x = x^{3} - 2 x^{2} + 1

x^{3} - 2 x^{2} + x - 1 = - x^{2} + 3 x - 1

30 x^{4} - 30 x^{2} = 0

4 x^{3} = x^{3} + 3 x^{2} + 2 x

What are the solutions to the equation 7x^3-9x^2-7x=-9 ?
The solutions to the equation 7x^3-9x^2-7x=-9 are x= 9/7 ,x=-1,x=1
Find the zeros of 7x^3-9x^2-7x=-9
The zeros of 7x^3-9x^2-7x=-9 are x= 9/7 ,x=-1,x=1