Question

Find(4) when f(x)=4x^2-3x+3

Answer 1

Assuming x = 4, replace each x in the equation with 4:

$4(4)^{2} - 3(4) + 3$

Solve each term in parentheses:

$4(4)^{2}$
$4^{2} = 16$
$4 \times 16 = 64$

$-3(4)$
$-3 \times 4 = -12$

Your equation should now look like this:

$64 - 12 + 3 = 55$

f(4) will equal 55.