Given f(x) = 5x2 – 3x + 1, find f(–2).
so would this be 5(-2*-2) -3(-2)+1
answer being 15
not correct
(I assume looking at your substitution that the first term is 5x^2 or 5x²)
f(x) = 5x^2 – 3x + 1
f(-2) = 5(-2)^2 - 3(-2) + 1
=5(4) + 6 + 1
=27
To find f(-2), you need to substitute -2 into the function f(x) = 5x^2 - 3x + 1.
First, replace every occurrence of x in the function with -2.
f(-2) = 5(-2)^2 - 3(-2) + 1
Next, simplify the expression by performing the calculations inside the parentheses.
= 5(4) - 3(-2) + 1
= 20 + 6 + 1
= 27
Therefore, the value of f(-2) is 27.