How do you factorise x squared minus 100?

Answer 1

your equation is this... x2 - 100

since you have no x term to the first power you can write 0x... like this

x2 + 0x - 100

Now, what numbers will add to 0 and multiply to -100

The numbers 10 and -10 will

10 + -10 = 0

10 * -10 = -100

therefore

(x - 10)(x + 10) is the way you factor it

Answer 2

X (x-100)

Answer 3

(X-50) (x-50)

Answer 4

(x-10)(x-10)