Answer:
substitute x = -23 into equation
Step-by-step explanation:
f(x) = 3x2-6x-1
this i interpret as 3 multiplied by 2. So,
f(x) = 6 -6(x) -1
substituting x = -23 ito f(x) , we get
f(-23) = 6 - 6 (-23) -1
f(-23) = 6 + 138 -1
f(-23) = 6 + 137
f(-23) = 143
