Question 122700
step 1: note that x^2= x*x

step 2: factor the constant term.
since the coefficient of the middle 
x term is +3, choose the factors 
-2 and 5, which combine to +3.

-10=(-1)(10) or (1)(-10)
or (-2)(5) or (2)(-5)

step 3: write the answer using parenthesis
beginning with x followed by the 
numerical factors

(x-2)(x+5)

to check your answer, you can use
the FOIL method to multiply the factors

(x-2)(x+5)=x^2+3x-10