Question

m^2-84=0 solve by factorization method

Answer 1

m^2-84=0
m(m-84)=0
m=0 OR m-84=0
m=84,


I hipe this is the correct answer

Answer 2

m^2 + 0m - 84 = 0

Discriminent= b^2 - 4ac
= 0 - 4*(-84) *(1)
= 336
m = (- b plus minus root D)/2a
m = ( 0 plus minus root 336)2
m = (plus minus 4 root 21)/2
m = (plus minus 2 root 21)

First root =
$2 \sqrt{21}$
Second root =
$- 2 \sqrt{21}$