Which text is valuable for gaining context about a historical event but is unreliable as “evidence”

History novels are valuable to gain the context of history but they are not reliable like a primary source documents. Primary source Documents involves Diaries, Journals, Letters, memos, Photos, Videos, Opinion Polls, Speeches and none the less governmental records.

Explanation:

I know this because history is about everything!

answer

explanation

the given equation is

we can rewrite this as:

let

then the equation becomes:

the factors of 8 that sum up to -9 are {-1,-8}

we split the middle term with these factors to obtain,

we factor by grouping to obtain:

apply the zero product property to get:

but