Factor by grouping (write out all of the factoring)
3x^2+18x-6x-36

3(x + 6)(x - 2)

Step-by-step explanation:

Given

3x² + 18x - 6x - 36 ← factor out 3 from each term

= 3(x² + 6x - 2x - 12) ( factor the first/second and third/fourth terms )

= 3(x(x + 6) - 2(x + 6)) ← factor out (x + 6) from each term

= 3(x + 6)(x - 2)

x+14

step-by-step explanation:

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.