If f(x) = - 2x2 + 2x - 3, what is f(5)?
To find the value of f(5), we need to substitute the value 5 into the function and evaluate it.
Given f(x) = -2x^2 + 2x - 3, we replace every occurrence of 'x' with 5.
f(5) = -2(5)^2 + 2(5) - 3
To simplify the expression, we perform the calculations inside the parenthesis first:
f(5) = -2(25) + 10 - 3
Next, we square 5 and multiply it by -2:
f(5) = -50 + 10 - 3
Now, we perform the addition and subtraction:
f(5) = -43
Therefore, f(5) equals -43.