Question

Find the value of f(x)=3x^2-x+23 for x=-4

Answer 1

it is so easy if u solve it as i do
here in the question it is given to u that
x=-4
okay ?
now the equation is f(x)=3x^2 - x +23
okay
now put the x=-4 in the above equation on the place of ''x'' okay?

so it would be
f(-4) = 3 (-4)^2 -(-4) +23
= 3 (16) + 4+23 since (-4)^2 =16 and - (-4)= +4
= 48 + 4 +23
f(-4) =75
this is your correct answer if u have any question then u can ask to me