Answer:
C. 3(2x+1)(x-2)
Step-by-step explanation:
To factor the trinomial 6x² - 9x -6, we will follow the steps below;
First, 3 is common among the three numbers, so we will start by factoring out 3, so that the expression becomes;
3(2x² - 3x - 2)
We will now proceed to factorize; 2x² - 3x - 2
Find two numbers such that its product gives -4 and its sum gives -3.
Such number is -4 and 1
-4 × 1 = -4
-4 + 1 = -3
We will replace -3x by -4x + x in the above expression
2x² - 4x + x - 2
(2x² - 4x) (+x - 2)
In the first parenthesis, 2x is common, so we will factor out 2x while in the second parenthesis 1 is common, so we will factor out 1. Hence;
2x(x - 2) + 1(x-2)
(2x+1)(x-2)
3(2x² - 3x - 2) = 3(2x+1)(x-2)
6x² – 9x – 6 = 3(2x+1)(x-2)
Therefore the factorized form of 6x² – 9x – 6 is 3(2x+1)(x-2)
