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olga55 [171]
3 years ago
7

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

Mathematics
1 answer:
zavuch27 [327]3 years ago
7 0

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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<u><em></em></u>

<u><em>Supplementary angles</em></u> are two angles whose angle measures add up to 180 degrees. You can know that they are supplementary because they can be connected by a straight line.

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