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Ksivusya [100]
3 years ago
8

URGENT.

Mathematics
2 answers:
ruslelena [56]3 years ago
8 0

Answer:

C) x = 5 or −5

Step-by-step explanation:

x^2 − 16 = 9

Add 16 to each side

x^2 − 16+16 = 9+16

x^2 = 25

Take the square root of each side

sqrt(x^2) = sqrt(25)

x = ±5

Mkey [24]3 years ago
7 0

Answer:

C

Step-by-step explanation:

First, begin by adding 16 to the other side of the equation.

x^2-16=9

x^2=25

Then, take the square root of both sides, which will cancel the "squared" on the x.

x=±5

It is plus or minus, because

5*5=25

and

-5* -5=25

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