The doctrine's sole aim to stop the spread of communism anywhere in the world. 1. truman 2. kennedy 3. eisenhower 4. roosevelt

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

i think it was   tsar alexander ii

explanation:

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