Because x was *3 you had to y*3 which is
y=6
Answer:
(-1, 19) and (3, -81)
Step-by-step explanation:
f(x) = 2x³ − 6x² − 27x
f'(x) = 6x² − 12x − 27
-9 = 6x² − 12x − 27
0 = 6x² − 12x − 18
0 = x² − 2x − 3
0 = (x + 1) (x − 3)
x = -1 or 3
f(-1) = 19
f(3) = -81
The points are (-1, 19) and (3, -81).
Answer:A for the first one and C for the second one
Step-by-step explanation:
1 and 4 will be the expression that makes the equatio. true for all values of x to prove i have done it in the picture attached in this message