How does 3x4-14x2-81 factor?

Answer 1

3x4 - 14 x 2 - 81

We note that 4 = 2^2

Substitute

3(2)^2 - 14(2) - 81

It is now in the form of a quadratic, with '2' taking the place of 'x'.

So using the Quadratic Eq'n

2 = --14 +/- sqrt[(-14)^2 - 4(3)(-81)]} / 2(3)

2 = 14 +/- sqrt[196 + 972 ] / 6

2 = 14 +/- sqrt[1168] / 6

2 = 14 +/- 34.176....] / 6

2 = 14 + 34.176... /

2 = 48.176... / 6

2 ~ 8. 0 Not resolved.

Overall this does NOT factor.

or

2 = 14 - 34.176 // 6

2 = - 20.176 / 6 #2

2 ~ 3.41 Not resolved.

2

Answer 2

I'm guessing that is 3x4 - 14x2 - 81. If so, I see no way that can be factored.