We have the equation x^2 = 16 and we want to solve for x.
Square root both sides:
x = +/- 4
A rational expression is considered undefined when the denominator is equal to 0 (in other words, we get something like k/0, which is undefined). Here, the because when x = 4, then the answer is B.
e x: A= 1/2 * 20 * 16 you brake in half the 20 into 10 ( 1/2 divided by 20 is 10 because half of 20 is 10) after you get 10 you bring down the 16 and you multiply the 10 & 16 and you get “016” also as “16”