Question

factorise 6 x square - 39 X - 21​

Answer 1

Step-by-step explanation:

Simplifying

6x2 + 39x = 21

Reorder the terms:

39x + 6x2 = 21

Solving

39x + 6x2 = 21

Solving for variable 'x'.

Reorder the terms:

-21 + 39x + 6x2 = 21 + -21

Combine like terms: 21 + -21 = 0

-21 + 39x + 6x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.

3(-7 + 13x + 2x2) = 0

Factor a trinomial.

3((-7 + -1x)(1 + -2x)) = 0

Answer 2

Answer : (1/2 , 7)

Step-by-step explanation:

6x²-39x-21=0

6x²-42x+3x-21=0

6x(x-7)+3(x-7)=0

(6×+3)(x-7)=0

thus,

6x-3=0 or x-7=0

6x=3 or x=7

x=1/2 or x=7

x=( 1/2 , 7)

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