Question

Find the product of (x + 5)(x − 5).

x^2 − 10x + 25

x^2 + 10x + 25

x^2 − 25

x^2 + 25

Answer 1

there is a general formula that you must remember
\[a ^{2}-b ^{2}=(a-b)(a+b)\]

Answer 2

Okay, can you tell me what the answer is?

Answer 3

if u look at the formular it's pretty obvious. in your case a = x and b = 5
(x-5)(x+5) = a^2 - b^2
what are a^2 and b^2?
x^2-5^2 = x^2 -25