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Tems11 [23]
3 years ago
15

Solve: 16x2 − 81 = 0

Mathematics
2 answers:
MrRa [10]3 years ago
8 0

Answer:

x =±9/4

Step-by-step explanation:

16x^2 − 81 = 0

Add 81 to each side

16x^2 − 81 +81 = 81

16 x^2 =18

Divide by 16

x^2 =81/16

Take the square root of each side

sqrt(x^2) = sqrt(81/16)

x =±9/4

Musya8 [376]3 years ago
7 0

16 x 2 - 81

32-81

= -49

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Answer:

Domain: all real numbers

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Step-by-step explanation:

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<u><em>Domain:</em></u>

The domain is all real numbers except where the slope is undefined (a vertical line). In this case, no number makes the expression undefined, so the domain is:

all real numbers

<u><em>Interval notation:</em></u><em>  </em>(-∞,∞)

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<em><u>Set-Builder Notation:</u></em> {x | x ∈ R }

<em><u>Range:</u></em>

The range is the set of all valid values. Graph the line and check. Since all values of y are valid, the range is:

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