Question

evaluate (x-4)(x+4)=​

Answer 1

Step-by-step explanation:

x-16 is the answer of this question

Answer 2

Answer:

Step-by-step explanation:

Way 1:

If you remember from your algebra class that (a+b)×(a-b)=a²-b²

We can solve this easily

BTW if you don't refer below

(x-4)×(x+4)= x²+4²

= x²-16

Way 2:

We are going to multiply these

(x-4)×(x+4)

= x(x-4)+4(x-4)

= x²-4x+4x-4²

Here, -4x cancels out with +4x and we get:

x²-4² = x-16

We see both methods give us correct answer so you can use the one you like

Hope it helps◉‿◉