Question

F(x)= -x^2+19 find f(3)

Answer 1

I’m not sure but this could help

Answer 2

`\boxed {\tt f(3)= 10}`

Explanation:

We are given the function:

`f(x)= -x^2+19`

We want to find f(3), therefore we must substitute 3 in for x.

`f(3)= -(3)^2+19`

Solve according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. Evaluate the exponent.

• (3)² = 3*3 = 9

`f(3)= -(9)+19`

`f(3)=-9+19`

Add 19 to -9.

`f(3)= 10`

For the function f(x)=-x²+19, f(3)= 10