How do you factor $x^2 - 10x + 9$ ?

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Answer 1 · 2016-06-30T16:08:12

$(x-9)(x-1)$

Find the factors of 9 which ADD (because of the + sign) up to 10.

The signs in the brackets will be the SAME (because of the + sign), they will both be NEGATIVE. (because of the minus 10)

now: $1 xx 9 = 9 and 1 + 9 = 10$ ,

so the required factors of 9 are 1 and 9.

$(x-9)(x-1)$

How do you factor x^2 - 10x + 9 x^2 - 10x + 9?