2 x 2 x 3 x 7.
http://wiki.answers.com/Q/What_is_the_prime_factor...

The factors of 84 are: 1,2,3,4,6,7,12,14,21, 28,42,and 84. Do the ChaCha!
http://www.chacha.com/question/whatarethefactor...

1. Press the "Y=" button on the TI84 graphing calculator. This will display a screen to input the trinomial equation. For example, type in the equation: (15X^2) + (14X)
http://www.ehow.com/how_10012278_factortrinomials...

The GCF of 84 and 78 is 6. 6*14 = 84 and 6*13 = 78.
http://wiki.answers.com/Q/What_is_the_greatest_com...
