Question

f(x)=-3x^2, evaluate f(3)

Answer 1

substitute x=3 into the equation
f(3)=-3(3)^2
f=?

Answer 2

-9^2

Answer 3

so would it be 81?

Answer 4

Or just -9^2

Answer 5

niether answers you posted is correct. Look carefully at the expression he gave you...
Use order of operations... do exponents first, then multiply

Answer 6

always do the brackets first, in this case you would have to do the exponents first as what @ByteMe said.

Answer 7

so do the exponents first and then multiply and you should get the right answer.

Answer 8

okk ty