How do you find dimensions by factoring?

Answer 1

A=x^2+10x+24

you need two numbers that will multiply to 24 and add to 10

(x+4) (x+6)

4 and 6 add up to 10 and multiply to equal 24

A = n^2+n-2

you need two numbers that will add up to one and multiply to -2

(n+2)(n-1)

2 and -1 add up to 1 and multiply to equal -2