URGENT.
Solve for x.
x^2 − 16 = 9
A) x = 3 or −3
B) x = 4 or −4
C) x = 5 or −5
D) x = 6 or −6

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

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

66.666666667%

step-by-step explanation:

divide 150 by 100

divide 100 by 1.5

there you go!

decreased by 33.333333334%

13.46

step-by-step explanation:

16.80 x .20 = 13.46