What are the solutions to the equation 8x^2=81 ?

The solutions to the equation 8x^2=81 are x= 9/(2sqrt(2)),x=-9/(2sqrt(2))

Find the zeros of 8x^2=81

The zeros of 8x^2=81 are x= 9/(2sqrt(2)),x=-9/(2sqrt(2))

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8 x^{2} = 81

x = \frac{9}{2 2}, x = - \frac{9}{2 2}

Decimal Notation

x = 3.18198 \dots, x = - 3.18198 \dots

Solution steps

8 x^{2} = 81

Divide both sides by

8

x^{2} = \frac{81}{8}

For

x^{2} = f (a)

the solutions are

x = f (a), - f (a)

x = \frac{81}{8}, x = - \frac{81}{8}

\frac{81}{8} = \frac{9}{2 2}

- \frac{81}{8} = - \frac{9}{2 2}

x = \frac{9}{2 2}, x = - \frac{9}{2 2}

3 y^{2} = - 16 y

(x + 3)^{2} = 121

10 x^{2} = - 20 x + 80

0.5 x^{2} + 2.1 x = 0.3

x^{2} + 2 x + \frac{1}{4} = 0

What are the solutions to the equation 8x^2=81 ?
The solutions to the equation 8x^2=81 are x= 9/(2sqrt(2)),x=-9/(2sqrt(2))
Find the zeros of 8x^2=81
The zeros of 8x^2=81 are x= 9/(2sqrt(2)),x=-9/(2sqrt(2))