How do you factor the expression $x^2 + 9x + 8$ ?

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Answer 1 · 2018-04-30T21:22:33

$=>(x+1)(x+8)$

$=>x^2+9x+8$

We need to find two factors of $8$ , such that the sum of the two factors is $9$ .

Factors of $8$ :

$=>1,8 -> 1+8=9$
$=>2,4 -> 2+4=6$

As we can see, the factors $1$ and $8$ give us a sum of $9$ .

Hence,

$=>x^2+9x+8=(x+1)(x+8)$

How do you factor the expression x^2 + 9x + 8x^2 + 9x + 8?