Find the value of the function y=3x2−21

Question

when x=4
.

Answer 1

To find the value of the function y=3x^2 - 21 when x=4, we need to substitute x=4 into the equation and solve for y.

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

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