Question

Factories x2 - 1....
solve..

Answer 1

Hey mate here's your answer

If you know how to factor you can write this as 

 

x^2 + 0x - 1

 

and now factor as usual.  You will be looking for 2 numbers that add to 0 and multiply to -1.  

 

By the way, this problem is a special kind of factoring called a difference of squares.  

 

When you have something of the form x^2 - a^2 it will always factor as (x-a)(x+a)

Hope it helps you

Answer 2

Theory- A difference of two perfect squares,  A2 - B2  can be factored into  (A+B) • (A-B)

Proof :  (A+B) • (A-B) =
         A2 - AB + BA - B2 =
         A2 - AB + AB - B2 = 
         A2 - B2

Note :  AB = BA is the commutative property of multiplication. 

Note :  - AB + AB equals zero and is therefore eliminated from the expression.

Check : 1 is the square of 1
Check :  x2  is the square of  x1 

Factorization is :       (x + 1)  •  (x - 1) 

mark brainliest