0
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
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