2007-09-02 14:08:24 · 9 answers · asked by brittsparky77 1 in Science & Mathematics ➔ Mathematics
x ² - 1 = (x - 1) (x + 1)
Check
(x - 1) (x + 1)
x (x + 1) - 1 (x + 1)
x ² + x - x - 1
x ² - 1
2007-09-02 19:53:33 · answer #1 · answered by Como 7 · 4⤊ 0⤋
X 2-1 Factored
2016-12-17 06:04:53 · answer #2 · answered by kreitman 4 · 0⤊ 0⤋
Factor X 2 1
2016-10-07 12:53:36 · answer #3 · answered by ? 4 · 0⤊ 0⤋
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RE:
How do you Factor x2-1 which x squared minus 1?
2015-08-10 07:09:48 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Learn to recognize "the difference between two squares," in this case, x-squared minus 1-squared. Then, as your first answer has it:
a² - b² = ( a + b ) ( a - b)
so, in your case,
x² - 1² = ( x + 1 ) ( x - 1 )
It even works with numbers. Since 25 - 9 is the difference of two squares, we can do an easy subtraction the hard way by saying:
25 - 9 = 5² - 3² = ( 5 + 3 ) ( 5 - 3 ) = (8)(2) = 16 .
2007-09-02 14:22:42 · answer #5 · answered by anobium625 6 · 1⤊ 0⤋
This is a difference of Squares
x^2 - 1 = (x + 1)(x - 1)
2007-09-02 14:12:15 · answer #6 · answered by Anonymous · 2⤊ 0⤋
a^2 - b^2 = (a+b)(a-b)
x^2 - 1
= x^2 - 1^2
= (x+1)(x-1)
2007-09-02 14:11:45 · answer #7 · answered by gudspeling 7 · 2⤊ 0⤋
x2-1
=x²-1
=x² - 1²
This is exactly like (a²-b²)=(a+b) (a-b)
=(x²-1²) = (x+1)(x-1)
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2007-09-02 14:40:24 · answer #8 · answered by Joymash 6 · 0⤊ 0⤋
(x-1)(x+1) = x2-1
2007-09-02 14:42:17 · answer #9 · answered by 1964school 1 · 0⤊ 1⤋