What are the solutions to the equation 3x^2-9=-21 ?

The solutions to the equation 3x^2-9=-21 are x=2i,x=-2i

Find the zeros of 3x^2-9=-21

The zeros of 3x^2-9=-21 are x=2i,x=-2i

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3 x^{2} - 9 = - 21

x = 2 i, x = - 2 i

Solution steps

3 x^{2} - 9 = - 21

Move

9

to the right side

3 x^{2} = - 12

Divide both sides by

3

x^{2} = - 4

For

x^{2} = f (a)

the solutions are

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

x = - 4, x = - - 4

- 4 = 2 i

- - 4 = - 2 i

x = 2 i, x = - 2 i

299 x^{2} + 100 x = 500 - 101 x^{2}

4 x + 3 \geq 7 x - 1

s^{3} + 2 s^{2} + s

\frac{- 1.38 \cdot 303.15}{- 1.6 \cdot 1 0 ^{- 4}}

5 y + 6 y - 81 = 7 y + 102 + 65 y

What are the solutions to the equation 3x^2-9=-21 ?
The solutions to the equation 3x^2-9=-21 are x=2i,x=-2i
Find the zeros of 3x^2-9=-21
The zeros of 3x^2-9=-21 are x=2i,x=-2i