Question

(x^2+4)(x^2-4)

Answer 1

x^4 - 16

Answer 2

Apply difference of squares rule:

(a+b)(a-b) = a^2 - b^2

Answer 3

In this case:

(x^2+4)(x^2=4) = (x^2)^2 - 4^2 = x^4 - 16

Answer 4

wow thats confusing

Answer 5

Write it down and study it

Answer 6

ok

Answer 7

for the last formula you wrote do you put (x^2=4) do you mean (x^2-4)

Answer 8

its the second part of the last formula you wrote

Answer 9

Write down the difference of squares rule, then write the solution to your problem. Put them side by side and you'll see it works

By the way a = x^2, b = 4