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

Question

y=

Answer 1

Substituting x with 4 in the equation y = 3x^2 - 21, we get:

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

Therefore, when x = 4, y = 27.