Question

Find and simplify
f(x)=6-7x^2
for: f(x+h)-f(x)

Answer 1

\( f(x+h)=6-7(x+h)^2 \) and \( f(x)=6-7x^2 \) then

\( f(x+h)-f(x)=6-7(x+h)^2-(6-7x^2)=6-7(x+h)^2-6+7x^2=7x^2-7(x+h)^2\)

can u continue ?

Answer 2

yeah i got to 6-7x^2+14xh+7h^2-6-7x^2 but not sure how to simplify after that

Answer 3

-12+14xh-7h^2 would that be right?

Answer 4

6-7x^2-14xh-7h^2-6+7x^2
-- -- --
compare with your answer and be carefull about signs

Answer 5

it would be -14xh-7h^2

Answer 6

or -14xh-7h^2?

Answer 7

leme try it in my hw

Answer 8

yes thats right try to work it out