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Use any method to solve the equation. If necessary, round to the nearest hundredth. 9x^2-21=0
0.65, –0.65

1.53, –1.53

3, –3

4.58, –4.58

Respuesta :

Answer:

x = 1.53, -1.53.

Step-by-step explanation:

9x^2 - 21 = 0

9x^2 = 21

x^2 = 21/9

x =  +/- √21 / 3

x = 1.53, -1.53.

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