What are the solutions to the equation 81/8 =3*r^3 ?

The solutions to the equation 81/8 =3*r^3 are r= 3/2 ,r=-3/4+(3sqrt(3))/4 i,r=-3/4-(3sqrt(3))/4 i

Find the zeros of 81/8 =3*r^3

The zeros of 81/8 =3*r^3 are r= 3/2 ,r=-3/4+(3sqrt(3))/4 i,r=-3/4-(3sqrt(3))/4 i

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

\frac{81}{8} = 3 \cdot r^{3}

r = \frac{3}{2}, r = - \frac{3}{4} + \frac{3 3}{4} i, r = - \frac{3}{4} - \frac{3 3}{4} i

Solution steps

\frac{81}{8} = 3 r^{3}

Switch sides

3 r^{3} = \frac{81}{8}

Divide both sides by

3

r^{3} = \frac{27}{8}

For

x^{3} = f (a)

the solutions are

Simplify

r = \frac{3}{2}, r = - \frac{3}{4} + \frac{3 3}{4} i, r = - \frac{3}{4} - \frac{3 3}{4} i

5 x^{4} - 45 x^{2} = 0

x^{4} - 11 x^{2} + 30 = 0

x^{3} + 5 x^{2} - 29 x + 15 = 0

(x^{2} + 3)^{2} + 21 = 10 x^{2} + 30

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

What are the solutions to the equation 81/8 =3*r^3 ?
The solutions to the equation 81/8 =3*r^3 are r= 3/2 ,r=-3/4+(3sqrt(3))/4 i,r=-3/4-(3sqrt(3))/4 i
Find the zeros of 81/8 =3*r^3
The zeros of 81/8 =3*r^3 are r= 3/2 ,r=-3/4+(3sqrt(3))/4 i,r=-3/4-(3sqrt(3))/4 i