Question

36-21x+3x². factories it

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Answer 1

Step-by-step explanation:

3x2-21x+36

3(x2-7x+12)

x2-7x+12

x2-3x-4x+12

x(x-3). -4(x-3)

(x-4). (x-3)

therefore x=4or3

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Answer 2

Answer:

First arrange this :

3x2 - 21x + 36

Now taking 3 is common , then

3 ( x2 - 7x + 12 ) = 0

x2 - 7x + 12 =0

x2 - 4x - 3x + 12 =0

x ( x- 4 ) - 3 ( x - 4 )

x = 3 ; x = 4