Question

3
$3 {x}^{2} - x - 4$
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Answer 1

3x²-x-4

= 3x²-(4-3)x-4

= 3x²-4x+3x-4

= x(3x-4)+1(3x-4)

= (3x-4)(x+1)

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Answer 2

3x² - x -4 = 0

3x² -4x+3x-4=0

x(3x-4)+1(3x-4)=0

(x+1)(3x-4)=0

(x+1)=0...............(3x-4)=0

x=-1..............x=4/3

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