what's the factor for this x^2+x-12?.please check my answer

Yes, that is correct, but your notation is very wrong. We need to use standard notation.

Do not write 1X to represent one X. Just write X instead.

(-4+-X)(3+-X)

Do not write +- to express the addition of a negative number. This is subtraction, so just write -.

(-4-X)(3-X)

This is okay, but some people would say that it is not "standard" enough. Write the variables first.

(-X-4)(-X+3)

Multiply each factor by -1 (which is the same as multiplying the entire expression by 1) so that we don't have -Xs.

(X+4)(X-3)

I say to put spaces around operators to make it easier to read.

(X + 4)(X - 3)

~ Mark :)
 
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