Find the value of the function y = 3 to the 2nd power -21 when x =4

Answer 1

To find the value of the function when x = 4, substitute x = 4 into the equation:

y = 3x^2 - 21

y = 3(4)^2 - 21
y = 3(16) - 21
y = 48 - 21
y = 27

Therefore, when x = 4, y = 27.