Find the value of the function y=3x2−21 when x=4 .

Answer 1

To find the value of the function y=3x^2−21 when x=4, we substitute x=4 into the function:

y = 3(4)^2 - 21

Simplifying the equation, we have:

y = 3(16) - 21

y = 48 - 21

y = 27

Therefore, the value of the function y=3x^2−21 when x=4 is 27.