??????????????? "n" ???????????
?????????? "(5x2)" ????????...maebee that mite be 5^2 ?????????
me thank yu tri tu sae 5x +5x^2=5*82
become x^2 +x=82
or x^2+x-82=0
quadratik equashun giv roots=8.569178574 & -9.569178574
b^2-4ac=329, sqrt(329)=18.138357147, sqrt/2a=9.069178573