9 Given m(x)= 3x - 9 and n(x)= - 4+2x, find m(x)- n(x).
Do not include spaces in your answer.

Step-by-step explanation:

m(x)= 3x - 9

n(x)= - 4+2x

m(x)- n(x) = 3x - 9 + 4 - 2x

= x - 5

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.

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