Factor the following trinomials .

x2 + 2x - 35

x2 - x - 12

Add up the first 2 terms, pulling out like factors :
                    x • (x-5)

Add up the last 2 terms, pulling out common factors :
                    7 • (x-5)
Add up the four terms of step 4 :
 (x+7)  •  (x-5)

Next

x^2 - 4x + 3x - 12

Add up the first 2 terms, pulling out like factors :
                    x • (x-4)

Add up the last 2 terms, pulling out common factors :
                    3 • (x-4)
Add up the four terms
                    (x+3)  •  (x-4)

4

step-by-step explanation:

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8